Hypericum androsaemum: Difference between revisions
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==Description== |
==Description== |
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''Hypericum androsaemum'' is a small bushy shrub, reaching {{Cvt|30-70|cm|ft}} tall. It has many [[Plant stem|stems]] which remain upright and erect instead of creeping over the ground. It has many oval-shaped leaves along its stems which are typically green with a red tint, and have small glands on their surface that can be seen upon close inspection and are filled with a red [[pigment]]. The plant has yellow flowers 1.5 to 2.5 cm in diameter with five [[Petal|petals]] and numerous [[Stamen|stamens]].<ref name=Stace>{{cite book|last=Stace|first=C. A.|author-link = Stace, C. A.|year=2019|title=New Flora of the British Isles|edition=Fourth|publisher=C & M Floristics|location = Middlewood Green, Suffolk, U.K.| isbn=978-1-5272-2630-2}}</ref> It has [[Berry|berries]] unique among ''Hypericum'' that turn from red to black and remain soft and fleshy even after ripening.<ref name=" |
''Hypericum androsaemum'' is a small bushy shrub, reaching {{Cvt|30-70|cm|ft}} tall. It has many [[Plant stem|stems]] which remain upright and erect instead of creeping over the ground. It has many oval-shaped leaves along its stems which are typically green with a red tint, and have small glands on their surface that can be seen upon close inspection and are filled with a red [[pigment]]. The plant has yellow flowers 1.5 to 2.5 cm in diameter with five [[Petal|petals]] and numerous [[Stamen|stamens]].<ref name=Stace>{{cite book|last=Stace|first=C. A.|author-link = Stace, C. A.|year=2019|title=New Flora of the British Isles|edition=Fourth|publisher=C & M Floristics|location = Middlewood Green, Suffolk, U.K.| isbn=978-1-5272-2630-2}}</ref> It has [[Berry|berries]] unique among ''Hypericum'' that turn from red to black and remain soft and fleshy even after ripening.<ref name="Robson-1985">{{Cite book |last=Robson |first=Norman |title=Studies in the genus Hypericum L. (Guttiferae): 3. Sections: 1. Campylosporus to: 6a. Umbraculoides. |publisher=Bulletin of the British Museum (Natural History) |year=1985 |isbn=0565080032}}</ref> The plant's stems are cylindrical in shape when the plant is mature.<ref name="Robson-1985" /> The bark on the stems has longitudinal grooves or scale-like patterns.<ref name="Robson-1985" /> |
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=== Foliage === |
=== Foliage === |
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[[File:Hypericum_androsaemum_L.-_Sp._Pl.-_784_(1753)._20210728_072227.jpg|thumb|A single stem with foliage and flowers]] |
[[File:Hypericum_androsaemum_L.-_Sp._Pl.-_784_(1753)._20210728_072227.jpg|thumb|A single stem with foliage and flowers]] |
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The leaves are arranged in opposite pairs without [[stipule]]s and lack [[Petiole (botany)|petioles]].<ref name=Stace/>The leaf blade is {{Cvt|4-12|cm|in}} long by {{Cvt|2-8|cm|in}} wide.<ref name=" |
The leaves are arranged in opposite pairs without [[stipule]]s and lack [[Petiole (botany)|petioles]].<ref name=Stace/>The leaf blade is {{Cvt|4-12|cm|in}} long by {{Cvt|2-8|cm|in}} wide.<ref name="Robson-1985" /> The leaves lack [[Trichome|hairs]] on either surface and have small oil [[Gland (botany)|glands]] across their surface.<ref name="Robson-1985" /> When these glands are crushed, they give off a pungent aroma and leak red [[pigment]]. <ref name="Parsons-2001">{{Cite book |last=Parsons |first=W. T. |url=https://www.worldcat.org/oclc/46774815 |title=Noxious weeds of Australia |date=2001 |publisher=CSIRO Pub |others=E. G. Cuthbertson |isbn=0-643-06514-8 |edition=2nd |location=Collingwood, VIC, Australia |pages=384-385 |oclc=46774815}}</ref> There are other translucent glands that are dispersed throughout the [[mesophyll]] at differing depths.<ref name="Perrone-2013">{{Cite journal |last=Perrone |first=Rosaria |last2=Rosa |first2=Paolode |last3=Castro |first3=Olgade |last4=Colombo |first4=Paolo |date=2013-10-01 |title=Leaf and stem anatomy in eight Hypericum species (Clusiaceae) |url=http://dx.doi.org/10.2478/botcro-2013-0008 |journal=Acta Botanica Croatica |volume=72 |issue=2 |pages=269–286 |doi=10.2478/botcro-2013-0008 |issn=0365-0588}}</ref> There are four or five symmetrical pairs of main veins along the leaf that point in the direction of the tip.<ref name="Robson-1985" /> |
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=== Inflorescence === |
=== Inflorescence === |
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[[File:Hypericum_androsaemum_sl39.jpg|left|thumb|upright=1.6|Different angles of the small inflorescence]] |
[[File:Hypericum_androsaemum_sl39.jpg|left|thumb|upright=1.6|Different angles of the small inflorescence]] |
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''Hypericum androsaemum'' has between one and eleven flowers on an [[inflorescence]], which has the form of a [[Inflorescence#Determinate or cymose|cyme]] and a [[corymb]]-like arrangement. There are never accessory flowers, but there are sometimes one to three flowering branches from the lower node. The [[Pedicel (botany)|pedicel stems]] are 8–14 mm long, with small lance-shaped [[Bract|bracts]].<ref name=" |
''Hypericum androsaemum'' has between one and eleven flowers on an [[inflorescence]], which has the form of a [[Inflorescence#Determinate or cymose|cyme]] and a [[corymb]]-like arrangement. There are never accessory flowers, but there are sometimes one to three flowering branches from the lower node. The [[Pedicel (botany)|pedicel stems]] are 8–14 mm long, with small lance-shaped [[Bract|bracts]].<ref name="Robson-1985" /> |
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The [[Flower|flowers]] are 15–25 mm in diameter and have globe-shaped [[Bud|buds]]. The [[Sepal|sepals]] are very unequal in size, about 6–12 mm long by 3–7 mm wide in an egg shape. The flower [[Petal|petals]] are a bright golden yellow without the red tinge that is present in the foliage. They curve inward and have an egg-like shape. The [[Stamen|stamens]] are arranged in five [[Fascicle (botany)|fascicles]] of twenty to twenty-five stamens the longest of which are 7–11 mm long. The [[Ovary (botany)|ovaries]] measure 4–5 mm long and 3.5–5 mm wide in the shape of a rough globe.<ref name=" |
The [[Flower|flowers]] are 15–25 mm in diameter and have globe-shaped [[Bud|buds]]. The [[Sepal|sepals]] are very unequal in size, about 6–12 mm long by 3–7 mm wide in an egg shape. The flower [[Petal|petals]] are a bright golden yellow without the red tinge that is present in the foliage. They curve inward and have an egg-like shape. The [[Stamen|stamens]] are arranged in five [[Fascicle (botany)|fascicles]] of twenty to twenty-five stamens the longest of which are 7–11 mm long. The [[Ovary (botany)|ovaries]] measure 4–5 mm long and 3.5–5 mm wide in the shape of a rough globe.<ref name="Robson-1985" /> [[File:Hypericum_androsaemum_Dziurawiec_barwierski_fruit_1.jpg|thumb|200x200px|The berries of ''H. androsaemum'' turn black after maturity]] |
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The [[Berry (botany)|berries]] of the plant turn from red to a unique black color not found in any other ''Hypericum'' species, which is caused by a [[xanthone]] present only in ''Hypericum androsaemum''.<ref name=" |
The [[Berry (botany)|berries]] of the plant turn from red to a unique black color not found in any other ''Hypericum'' species, which is caused by a [[xanthone]] present only in ''Hypericum androsaemum''.<ref name="Caprioli-2016" /> Another unique characteristic of the species' berries is that they remain fleshy and mostly soft when they ripen, instead of hardening and drying out like other related species.<ref name="Caprioli-2016">{{Cite journal |last=Caprioli |first=Giovanni |last2=Alunno |first2=Alessia |last3=Beghelli |first3=Daniela |last4=Bianco |first4=Armandodoriano |last5=Bramucci |first5=Massimo |last6=Frezza |first6=Claudio |last7=Iannarelli |first7=Romilde |last8=Papa |first8=Fabrizio |last9=Quassinti |first9=Luana |last10=Sagratini |first10=Gianni |last11=Tirillini |first11=Bruno |last12=Venditti |first12=Alessandro |last13=Vittori |first13=Sauro |last14=Maggi |first14=Filippo |display-authors=3 |date=2016 |title=Polar Constituents and Biological Activity of the Berry-Like Fruits from Hypericum androsaemum L. |url=https://www.frontiersin.org/articles/10.3389/fpls.2016.00232 |journal=Frontiers in Plant Science |volume=7 |doi=10.3389/fpls.2016.00232/full |issn=1664-462X}}</ref> The berries measure 7–12 mm long and 6–8 mm wide with thin casings. The [[Seed|seeds]] inside are a reddish-brown color.<ref name="Robson-1985" /> |
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=== Phytochemistry === |
=== Phytochemistry === |
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''Hypericum androsaemum'' has a well-studied [[Phytochemistry|phytochemical]] profile as a result of its use as folk medicine and an herbal supplement. More than eighty essential compounds have been identified from its leaves. The total density of essential oil has been recorded as high as 0.34%. Several different [[sesquiterpene]] [[Hydrocarbon|hydrocarbons]] dominate the profile, and intermediate and long chain [[Alkene|alkenes]] are highly present. Less prolific compounds include [[caryophyllene]] and [[gurjunene]].<ref>{{Cite journal |last=Guedes |first=Ana P. |last2=Amorim |first2=Lúcia R. |last3=Vicente |first3=Ana |last4=Fernandes-Ferreira |first4=M. |date=2004 |title=Variation of the essential oil content and composition in leaves from cultivated plants ofHypericum androsaemum L. |url=https://onlinelibrary.wiley.com/doi/10.1002/pca.758 |journal=Phytochemical Analysis |language=en |volume=15 |issue=3 |pages=146–151 |doi=10.1002/pca.758 |issn=0958-0344}}</ref> Many of these essential oils and other [[Phenols|phenolic]] compounds are present in higher quantities while the flowers are still growing.<ref name=" |
''Hypericum androsaemum'' has a well-studied [[Phytochemistry|phytochemical]] profile as a result of its use as folk medicine and an herbal supplement. More than eighty essential compounds have been identified from its leaves. The total density of essential oil has been recorded as high as 0.34%. Several different [[sesquiterpene]] [[Hydrocarbon|hydrocarbons]] dominate the profile, and intermediate and long chain [[Alkene|alkenes]] are highly present. Less prolific compounds include [[caryophyllene]] and [[gurjunene]].<ref>{{Cite journal |last=Guedes |first=Ana P. |last2=Amorim |first2=Lúcia R. |last3=Vicente |first3=Ana |last4=Fernandes-Ferreira |first4=M. |date=2004 |title=Variation of the essential oil content and composition in leaves from cultivated plants ofHypericum androsaemum L. |url=https://onlinelibrary.wiley.com/doi/10.1002/pca.758 |journal=Phytochemical Analysis |language=en |volume=15 |issue=3 |pages=146–151 |doi=10.1002/pca.758 |issn=0958-0344}}</ref> Many of these essential oils and other [[Phenols|phenolic]] compounds are present in higher quantities while the flowers are still growing.<ref name="Cirak-2022">{{Cite journal |last=Cirak |first=Cuneyt |last2=Seyis |first2=Fatih |last3=Özcan |first3=Aysel |last4=Yurteri |first4=Emine |date=2022-06-01 |title=Ontogenetic changes in phenolic contents and volatile composition of Hypericum androsaemum and Hypericum xylosteifolium |url=https://www.sciencedirect.com/science/article/pii/S0305197822000485 |journal=Biochemical Systematics and Ecology |language=en |volume=102 |pages=104429 |doi=10.1016/j.bse.2022.104429 |issn=0305-1978}}</ref> While less studied than the leaves of the plant, the berries of ''H. androsaemum'' are rich in chemical constituents as well. Many of these constituents are found in higher densities (or only) while the fruits are red. The most present chemicals are [[chlorogenic acid]], [[shikimic acid]], [[rutin]], [[epicatechin]], and [[hyperoside]].<ref name="Caprioli-2016" /> |
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== Taxonomy == |
== Taxonomy == |
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=== Nomenclature === |
=== Nomenclature === |
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The genus name ''Hypericum'' derives from the [[Greek language|Greek]] words ''hyper'', meaning above, and ''eikon'', meaning picture. This refers to the practice of hanging the flower "above pictures" to ward off evil spirits. The [[Specific epithet (botany)|specific epithet]] ''androsaemum'' comes from the Greek word ''androsaemus'', which was used to describe plants with red sap. It is a combination of the words ''andros'', meaning man, and ''haima'', meaning blood.<ref>{{Cite web |title=Hypericum androsaemum {{!}} Landscape Plants {{!}} Oregon State University |url=https://landscapeplants.oregonstate.edu/plants/hypericum-androsaemum |access-date=2023-04-07 |website=landscapeplants.oregonstate.edu}}</ref> The common name '''tutsan''' is [[French language|French]] in origin, and derives from the phrase ''tout-saine'', which means heal-all, in reference to the plant's medicinal properties.<ref name=" |
The genus name ''Hypericum'' derives from the [[Greek language|Greek]] words ''hyper'', meaning above, and ''eikon'', meaning picture. This refers to the practice of hanging the flower "above pictures" to ward off evil spirits. The [[Specific epithet (botany)|specific epithet]] ''androsaemum'' comes from the Greek word ''androsaemus'', which was used to describe plants with red sap. It is a combination of the words ''andros'', meaning man, and ''haima'', meaning blood.<ref>{{Cite web |title=Hypericum androsaemum {{!}} Landscape Plants {{!}} Oregon State University |url=https://landscapeplants.oregonstate.edu/plants/hypericum-androsaemum |access-date=2023-04-07 |website=landscapeplants.oregonstate.edu}}</ref> The common name '''tutsan''' is [[French language|French]] in origin, and derives from the phrase ''tout-saine'', which means heal-all, in reference to the plant's medicinal properties.<ref name="Parsons-2001" /> Its alternative name '''sweet-amber''' is in reference to the [[ambergris]]-like aroma that is emitted when oil glands on its leaves are crushed.<ref name="www.missouribotanicalgarden.org">{{Cite web |title=Hypericum androsaemum - Plant Finder |url=https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=279202 |access-date=2023-04-16 |website=www.missouribotanicalgarden.org}}</ref> |
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While ''Hypericum androsaemum'' is the most well-known plant named tutsan, other species share that common name. For example, ''[[Hypericum xylosteifolium|H. xylosteifolium]]'' is called "Turkish tutsan" and ''[[Hypericum hircinum|H. hircinum]]'' is called "Stinking tutsan".<ref name=" |
While ''Hypericum androsaemum'' is the most well-known plant named tutsan, other species share that common name. For example, ''[[Hypericum xylosteifolium|H. xylosteifolium]]'' is called "Turkish tutsan" and ''[[Hypericum hircinum|H. hircinum]]'' is called "Stinking tutsan".<ref name="Cirak-2022" /> |
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=== History === |
=== History === |
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[[File:Hortus_Eystettensis,_1640_(BHL_45339_265)_-_Classis_Aestiva_113.jpg|thumb|253x253px|The species in ''[[Hortus Eystettensis]]''. The inscriptions read (from left to right): Androsaemum foeditum seu Tragôdes, Siciliana, Hÿpericon.]] |
[[File:Hortus_Eystettensis,_1640_(BHL_45339_265)_-_Classis_Aestiva_113.jpg|thumb|253x253px|The species in ''[[Hortus Eystettensis]]''. The inscriptions read (from left to right): Androsaemum foeditum seu Tragôdes, Siciliana, Hÿpericon.]] |
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''Hypericum androsaemum'' was known and studied long before the modern system of [[Taxonomy (biology)|taxonomy]] was developed. For example, tutsan was depicted in the 1640 volume of ''[[Hortus Eystettensis]]'', a revolutionary book of botanical illustrations. In the codex, the plant was noted to be from [[Sicily]], of the grouping Hÿpericon (a pre-[[Carl Linnaeus|Linnean]] version of ''Hypericum''), and called "Androsaemum foeditum" or "Tragôdes".<ref>{{Cite book |last=Besler |first=Basilius |url=http://dx.doi.org/10.5962/bhl.title.45339 |title=Hortus Eystettensis, sive, Diligens et accurata omnium plantarum, florum, stirpium : ex variis orbis terrae partibus, singulari studio collectarum, quae in celeberrimis viridariis arcem episcopalem ibidem cingentibus, olim conspiciebantur delineatio et ad vivum repraesentatio et advivum repraesentatio opera |date=1640 |publisher=s.n.] |location=[Nürnberg?}}</ref> The species was first [[Species description|formally described]] in the [[Linnaean taxonomy|modern system]] by [[Carl Linnaeus]]. He described the species as ''Hypericum androsaemum'' in the second volume of his ''[[Species Plantarum]]'' in 1763 alongside around twenty other ''Hypericum'' species. Compiling several brief notes from other authorities, Linnaeus gave the following description for the plant:<ref name=" |
''Hypericum androsaemum'' was known and studied long before the modern system of [[Taxonomy (biology)|taxonomy]] was developed. For example, tutsan was depicted in the 1640 volume of ''[[Hortus Eystettensis]]'', a revolutionary book of botanical illustrations. In the codex, the plant was noted to be from [[Sicily]], of the grouping Hÿpericon (a pre-[[Carl Linnaeus|Linnean]] version of ''Hypericum''), and called "Androsaemum foeditum" or "Tragôdes".<ref name=Besler>{{Cite book |last=Besler |first=Basilius |url=http://dx.doi.org/10.5962/bhl.title.45339 |title=Hortus Eystettensis, sive, Diligens et accurata omnium plantarum, florum, stirpium : ex variis orbis terrae partibus, singulari studio collectarum, quae in celeberrimis viridariis arcem episcopalem ibidem cingentibus, olim conspiciebantur delineatio et ad vivum repraesentatio et advivum repraesentatio opera |date=1640 |publisher=s.n.] |location=[Nürnberg?}}</ref> The species was first [[Species description|formally described]] in the [[Linnaean taxonomy|modern system]] by [[Carl Linnaeus]]. He described the species as ''Hypericum androsaemum'' in the second volume of his ''[[Species Plantarum]]'' in 1763 alongside around twenty other ''Hypericum'' species. Compiling several brief notes from other authorities, Linnaeus gave the following description for the plant:<ref name="Linnaeus1753">{{Cite book |last=Linné |first=Carl von |url=https://www.biodiversitylibrary.org/item/13830 |title=Caroli Linnaei ... Species plantarum :exhibentes plantas rite cognitas, ad genera relatas, cum differentiis specificis, nominibus trivialibus, synonymis selectis, locis natalibus, secundum systema sexuale digestas... |last2=Salvius |first2=Lars |date=1753 |publisher=Impensis Laurentii Salvii |volume=2 |location=Holmiae |pages=783 |language=la}}</ref>{{Text and translation|Floribus trigynis, fructu baccato, caule fruticoso acipiti. |
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Foliis ovatis pedunculo longloribus.|With three-flowered inflorescence, bacciferous fruit (berries), and a bushy stem. |
Foliis ovatis pedunculo longloribus.|With three-flowered inflorescence, bacciferous fruit (berries), and a bushy stem. |
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With ovate leaves and long stalks.}}In the same entry, Linnaeus noted the species' presence in England and its tendency to be found around fences.<ref name=" |
With ovate leaves and long stalks.}}In the same entry, Linnaeus noted the species' presence in England and its tendency to be found around fences.<ref name="Linnaeus1753"/> This original description and type specimen analysis by Linnaeus remains the basis for the modern definition of the species. However, since that original description numerous illegitimate synonyms have been created for various reasons. In fact, while there is now solid consensus that ''H. androsaemum'' belongs within the genus ''Hypericum'',<ref name="powo">{{Cite web |title=Hypericum androsaemum L. |work=Plants of the World Online|publisher=Royal Botanic Gardens, Kew |url=http://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:433187-1 |access-date=2023-04-21 }}</ref> it was placed into a separate genus called ''Androsaemum'' as recently as 1893.<ref>{{Cite journal |last=Moldenke |first=Harold N. |date=1932 |title=A Discussion of Tautonyms |url=https://www.jstor.org/stable/2480467 |journal=Bulletin of the Torrey Botanical Club |volume=59 |issue=3 |pages=142 |doi=10.2307/2480467 |issn=0040-9618}}</ref> |
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In 1796, the garden of [[Chapel Allerton]] published a list of their plant specimens, noting ''Hypericum androsaemum'' as being in their collection, along with the fact it had been described by Linnaeus. However, they still applied two [[Nomen illegitimum|superfluous names]] (''Androsaemum floridum'' and ''Hypericum floridum'') to their specimens;<ref>{{Cite book |last=Salisbury |first=R. A. |url=https://www.biodiversitylibrary.org/item/9522 |title=Prodromus stirpium in horto ad Chapel Allerton vigentium |date=1796 |publisher=[s.n.] |location=Londini}}</ref> these names were never accepted as legitimate.<ref name=" |
In 1796, the garden of [[Chapel Allerton]] published a list of their plant specimens, noting ''Hypericum androsaemum'' as being in their collection, along with the fact it had been described by Linnaeus. However, they still applied two [[Nomen illegitimum|superfluous names]] (''Androsaemum floridum'' and ''Hypericum floridum'') to their specimens;<ref name=Salisbury>{{Cite book |last=Salisbury |first=R. A. |url=https://www.biodiversitylibrary.org/item/9522 |title=Prodromus stirpium in horto ad Chapel Allerton vigentium |date=1796 |publisher=[s.n.] |location=Londini}}</ref> these names were never accepted as legitimate.<ref name="powo" /> Only one validly published [[Heterotypic synonym|heterotypic]] synonym for ''Hypericum androsaemum'' has arisen since its original description. In 1785, [[Carlo Allioni]] published a description of a specimen he called ''Androsaemum officinale'', without referencing Linnaeus' original description of ''Hypericum androsaemum''. Still, the description corroborated with the one given by Linnaeus and there is consensus that the specimen Allioni observed did, in fact, belong to ''Hypericum androsaemum'' and was not a separate species.<ref name=Zumaglini>{{Cite book |last=Zumaglini |first=Antonio Mauritio |url=https://www.biodiversitylibrary.org/item/106666 |title=Flora Pedemontana : sive Species plantarum Phanerogamarum in Pedemonte et Liguria sponte nascentium ... |date=1849 |publisher=J. Favale |volume=1 |location=Augustae Taurinorum [Torino]}}</ref> |
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The status of ''Hypericum androsaemum'' was definitively resolved with [[Norman Robson (botanist)|Norman Robson's]] comprehensive [[monograph]] of the genus ''Hypericum'' in 1996. Robson established 36 [[Section (botany)|sections]] within the genus which grouped together very similar species. He designated ''H. androsaemum'' as the type species of sect. ''Androsaemum'' and clarified its [[lectotype]] specimen. Because the actual type specimen that Linnaeus analyzed was not preserved, Robson selected an illustration from ''[[Hortus Cliffortianus]]'', which Linnaeus would have at least seen, to serve as the lectotype for the species.<ref name=" |
The status of ''Hypericum androsaemum'' was definitively resolved with [[Norman Robson (botanist)|Norman Robson's]] comprehensive [[monograph]] of the genus ''Hypericum'' in 1996. Robson established 36 [[Section (botany)|sections]] within the genus which grouped together very similar species. He designated ''H. androsaemum'' as the type species of sect. ''Androsaemum'' and clarified its [[lectotype]] specimen. Because the actual type specimen that Linnaeus analyzed was not preserved, Robson selected an illustration from ''[[Hortus Cliffortianus]]'', which Linnaeus would have at least seen, to serve as the lectotype for the species.<ref name="Robson-1985" /> |
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|+Synonyms<ref name=" |
|+Synonyms<ref name="powo" /> |
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=== Subdivision === |
=== Subdivision === |
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''Hypericum androsaemum'' exhibits a great deal of variation in appearance, especially in cultivation. When this variation is deliberately brought out through selective breeding, the resulting forms are called "[[Cultivar|cultivars]]"; however, when populations develop unique traits on their own while in cultivation, those populations can be described by a legitimate botanical name. In the case of ''H. androsaemum'', two such names have been given: ''H. androsaemum'' [[Variety (botany)|var.]] ''aureum'' has yellow-green leaves, and ''H. androsaemum'' [[Form (botany)|f.]] ''variegatum'' has [[Variegation|variegated]] leaves.<ref name=" |
''Hypericum androsaemum'' exhibits a great deal of variation in appearance, especially in cultivation. When this variation is deliberately brought out through selective breeding, the resulting forms are called "[[Cultivar|cultivars]]"; however, when populations develop unique traits on their own while in cultivation, those populations can be described by a legitimate botanical name. In the case of ''H. androsaemum'', two such names have been given: ''H. androsaemum'' [[Variety (botany)|var.]] ''aureum'' has yellow-green leaves, and ''H. androsaemum'' [[Form (botany)|f.]] ''variegatum'' has [[Variegation|variegated]] leaves.<ref name="Robson-1985" /> |
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In the wild, ''H. androsaemum'' exhibits a similarly wide range of physical traits. Larger-flowered plants tend to have red-tinted leaves and larger fruits; smaller-flowered plants have greener leaves and smaller fruits. These traits are not binary, though, and there is a continuous spectrum of forms that link those two extremes wherever they are found. Thus, no legitimate names are given to any of these forms.<ref name=" |
In the wild, ''H. androsaemum'' exhibits a similarly wide range of physical traits. Larger-flowered plants tend to have red-tinted leaves and larger fruits; smaller-flowered plants have greener leaves and smaller fruits. These traits are not binary, though, and there is a continuous spectrum of forms that link those two extremes wherever they are found. Thus, no legitimate names are given to any of these forms.<ref name="Robson-1985" /> |
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=== Similar species === |
=== Similar species === |
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''Hypericum androsaemum'' is similar in appearance to the other species in section ''Androsaemum''. It can be told apart from ''[[Hypericum foliosum|H. foliosum]]'' and [[Hypericum × inodorum|''H.'' × ''inodorum'']] by its shorter styles, the unique black color of its ripe berries, and that its petals are never longer than its sepals.<ref name=" |
''Hypericum androsaemum'' is similar in appearance to the other species in section ''Androsaemum''. It can be told apart from ''[[Hypericum foliosum|H. foliosum]]'' and [[Hypericum × inodorum|''H.'' × ''inodorum'']] by its shorter styles, the unique black color of its ripe berries, and that its petals are never longer than its sepals.<ref name="Robson-1985" /> In addition to the species of section ''Androsaemum'', it is highly similar to ''[[Hypericum xylosteifolium]]'', the sole species in section ''Inodorum''. The most apparent [[Morphology (biology)|morphological]] difference between it and ''H. xylosteifolium'' is that the seed capsules (berries) of the latter species dry completely when they are mature, whereas those of ''H. androsaemum'' remain soft and fleshy.<ref name="Cirak-2022" /> The berries of ''H. androsaemum'' only dry if they are left on the plant for around a month after ripening, and will begin to wither at that same time.<ref name="Robson-1985" /> |
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<gallery class="center" mode="nolines" widths="250" heights="170" caption="Comparison of inflorescences of related species"> |
<gallery class="center" mode="nolines" widths="250" heights="170" caption="Comparison of inflorescences of related species"> |
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== Habitat == |
== Habitat == |
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''Hypericum androsaemum'' is found in damp and shady areas at a great range of elevations, from low-lying regions up to {{Cvt|1800|m|ft}}.<ref name=" |
''Hypericum androsaemum'' is found in damp and shady areas at a great range of elevations, from low-lying regions up to {{Cvt|1800|m|ft}}.<ref name="Robson-1985" /> It requires heavy rainfall, typically greater than {{Cvt|750|mm|in}} of annual precipitation.<ref name="Parsons-2001" /> |
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=== Distribution === |
=== Distribution === |
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The species has a wide [[Native species|native]] distribution, but is most densely found in Western Europe. It is particularly abundant across the [[British Isles]] (except for in the [[Scottish Highlands]]), in the [[Ardennes]] forest of Belgium and France, and on the western French coast. Other European populations include the [[Pyrenees|Pyrenees Mountains]], across northern Spain and Portugal, and around [[Genoa]] and parts of central Italy. Scattered sightings have been reported through Germany and as far north as Denmark, as well as in Switzerland, Austria, and the [[Balkans]]. Outside of Europe, ''H. androsaemum'' is found in northern Turkey, the North African coast, the [[Caucasus]], and Iran. While it may have at one point been native to the island of [[Corsica]], it is now believed to be extinct there.<ref name=" |
The species has a wide [[Native species|native]] distribution, but is most densely found in Western Europe. It is particularly abundant across the [[British Isles]] (except for in the [[Scottish Highlands]]), in the [[Ardennes]] forest of Belgium and France, and on the western French coast. Other European populations include the [[Pyrenees|Pyrenees Mountains]], across northern Spain and Portugal, and around [[Genoa]] and parts of central Italy. Scattered sightings have been reported through Germany and as far north as Denmark, as well as in Switzerland, Austria, and the [[Balkans]]. Outside of Europe, ''H. androsaemum'' is found in northern Turkey, the North African coast, the [[Caucasus]], and Iran. While it may have at one point been native to the island of [[Corsica]], it is now believed to be extinct there.<ref name="Robson-1985" /> |
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''Hypericum androsaemum'' has become [[Naturalization|naturalized]] or [[Invasive species|invasive]] in regions to which it is not native. In Australia, it is densely found in the [[Great Otway National Park|Otway Ranges]], [[South Gippsland|South Gippsland Hills]], [[Dandenong Ranges]], the [[Blue Mountains (New South Wales)|Blue Mountains]], and in the area around [[Mansfield, Queensland|Mansfield]]. There are also a few scattered populations on [[Tasmania]], but it is not troublesome there. In New Zealand, it is found on both islands frequently enough to be an encroaching weed.<ref name=" |
''Hypericum androsaemum'' has become [[Naturalization|naturalized]] or [[Invasive species|invasive]] in regions to which it is not native. In Australia, it is densely found in the [[Great Otway National Park|Otway Ranges]], [[South Gippsland|South Gippsland Hills]], [[Dandenong Ranges]], the [[Blue Mountains (New South Wales)|Blue Mountains]], and in the area around [[Mansfield, Queensland|Mansfield]]. There are also a few scattered populations on [[Tasmania]], but it is not troublesome there. In New Zealand, it is found on both islands frequently enough to be an encroaching weed.<ref name="Parsons-2001" /> |
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=== Invasiveness === |
=== Invasiveness === |
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In the late 19th century, ''H. androsaemum'' was a popular [[ornamental plant]], leading to its widespread dispersal in non-native regions. While its seeds don't have any special properties that increase their potential for dispersal, they are small and extremely numerous. This allows the seeds to easily contaminate cargo, animals, clothing, vehicles, or other transported items. The species was invasively introduced to [[Australia]] in 1865 via the [[Royal Horticultural Society|Royal Horticultural Society's]] [[botanical garden]] in [[Hobart]], apparently for use as an [[Ornamental plant|ornamental species]] because of its reddish leaves and bright yellow flowers. In [[New Zealand]], the primary method of invasive [[Dispersal vector|dispersal]] is reportedly by birds.<ref name=" |
In the late 19th century, ''H. androsaemum'' was a popular [[ornamental plant]], leading to its widespread dispersal in non-native regions. While its seeds don't have any special properties that increase their potential for dispersal, they are small and extremely numerous. This allows the seeds to easily contaminate cargo, animals, clothing, vehicles, or other transported items. The species was invasively introduced to [[Australia]] in 1865 via the [[Royal Horticultural Society|Royal Horticultural Society's]] [[botanical garden]] in [[Hobart]], apparently for use as an [[Ornamental plant|ornamental species]] because of its reddish leaves and bright yellow flowers. In [[New Zealand]], the primary method of invasive [[Dispersal vector|dispersal]] is reportedly by birds.<ref name="Parsons-2001" /> |
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In 2008, [[Landcare Research]] began investigating the feasibility of a [[Biological pest control|biological control]] for the species. The seed and leaf-tip eating moth ''[[Lathronympha strigana]]'' and the leaf-feeding beetle ''[[Chrysolina abchasica]]'' were tested and found to be sufficiently host specific and not a risk to native plant species. As of February 2017, moths were released at 30 sites around the central North Island in New Zealand; however, the beetle is more difficult to rear in captivity, so only one release has been made so far.<ref>{{cite web |last1=Hugh Gourlay |title=Tutsan Agents Released |url=http://www.landcareresearch.co.nz/publications/newsletters/biological-control-of-weeds/issue-80/tustan-agents-released |website=landcareresearch.co.nz}}</ref> |
In 2008, [[Landcare Research]] began investigating the feasibility of a [[Biological pest control|biological control]] for the species. The seed and leaf-tip eating moth ''[[Lathronympha strigana]]'' and the leaf-feeding beetle ''[[Chrysolina abchasica]]'' were tested and found to be sufficiently host specific and not a risk to native plant species. As of February 2017, moths were released at 30 sites around the central North Island in New Zealand; however, the beetle is more difficult to rear in captivity, so only one release has been made so far.<ref name=Gourlay>{{cite web |last1=Hugh Gourlay |title=Tutsan Agents Released |url=http://www.landcareresearch.co.nz/publications/newsletters/biological-control-of-weeds/issue-80/tustan-agents-released |website=landcareresearch.co.nz}}</ref> |
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== Ecology == |
== Ecology == |
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[[File:Millepertuis_androsème-Longicorne-201607013.jpg|thumb|200x200px|An [[Orthoptera]] [[larva]] on a flower of ''H. androsaemum'']] |
[[File:Millepertuis_androsème-Longicorne-201607013.jpg|thumb|200x200px|An [[Orthoptera]] [[larva]] on a flower of ''H. androsaemum'']] |
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Seeds of ''Hypericum androsaemum'' [[Germination|germinate]] in the fall. They flower when the plant is between 18–24 months old, typically from late spring to early summer, with the fruit ripening by late summer. The plant is partially [[deciduous]], losing most of its foliage in the fall but with rapid regrowth every spring.<ref name=" |
Seeds of ''Hypericum androsaemum'' [[Germination|germinate]] in the fall. They flower when the plant is between 18–24 months old, typically from late spring to early summer, with the fruit ripening by late summer. The plant is partially [[deciduous]], losing most of its foliage in the fall but with rapid regrowth every spring.<ref name="Parsons-2001" /> |
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=== Cultivation === |
=== Cultivation === |
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When [[Horticulture|cultivated]], ''Hypericum androsaemum'' requires minimal maintenance. The species is generally pest and disease free, and is deer resistant.<ref>{{Cite web |title=Hypericum androsaemum (Sweet Amber) |url=https://www.gardenia.net/plant/hypericum-androsaemum |access-date=2023-04-07 |website=Gardenia.net |language=en}}</ref> However, it can be prone to [[Nematode|nematodes]] which cause [[root rot]]; pest insects such as [[thrips]] and [[Scale insect|scale]] have been noted. Additionally, in hot and humid climates the species is susceptible to wilting and unrelated root rot.<ref name=" |
When [[Horticulture|cultivated]], ''Hypericum androsaemum'' requires minimal maintenance. The species is generally pest and disease free, and is deer resistant.<ref name=Gardenia>{{Cite web |title=Hypericum androsaemum (Sweet Amber) |url=https://www.gardenia.net/plant/hypericum-androsaemum |access-date=2023-04-07 |website=Gardenia.net |language=en}}</ref> However, it can be prone to [[Nematode|nematodes]] which cause [[root rot]]; pest insects such as [[thrips]] and [[Scale insect|scale]] have been noted. Additionally, in hot and humid climates the species is susceptible to wilting and unrelated root rot.<ref name="www.missouribotanicalgarden.org" /> It is tolerant of moderately acidic and alkaline soils, and can withstand drought and freezing temperatures down to -20° [[Celsius|C]] (-4° [[Fahrenheit|F]]). While the plant performs best if spaced roughly {{Cvt|90|cm|ft}} apart from others, it will self-sow via seed in its area if allowed, creating ground cover. After the plant has lost its leaves in the fall, it can be cut back if needed and will regrow from the base in the spring.<ref name="pfaf.org">, {{Cite web |title=Hypericum androsaemum Tutsan, Sweet-amber, St. Johnswort PFAF Plant Database |url=https://pfaf.org/user/plant.aspx?latinname=Hypericum+androsaemum |access-date=2023-04-07 |website=pfaf.org}}</ref> |
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Most ''Hypericum'' species are difficult to germinate because of heavy [[seed dormancy]]. ''Hypericum androsaemum'' exhibits both physiological dormancy and chemical dormancy, meaning that seed germination can be kickstarted by both physical and chemical factors. In particular, room-temperature water or the plant hormone [[gibberellic acid]] were most effective at bringing its seeds out of a dormant state.<ref>{{Cite journal |last=Çýrak |first=Cüneyt |date=2006 |title=Physiological and Physical Seed Dormancy of some ''Hypericum'' Species Growing in Turkey |journal=Plant Breeding and Seed Science |volume=53}}</ref> |
Most ''Hypericum'' species are difficult to germinate because of heavy [[seed dormancy]]. ''Hypericum androsaemum'' exhibits both physiological dormancy and chemical dormancy, meaning that seed germination can be kickstarted by both physical and chemical factors. In particular, room-temperature water or the plant hormone [[gibberellic acid]] were most effective at bringing its seeds out of a dormant state.<ref name=Çýrak>{{Cite journal |last=Çýrak |first=Cüneyt |date=2006 |title=Physiological and Physical Seed Dormancy of some ''Hypericum'' Species Growing in Turkey |journal=Plant Breeding and Seed Science |volume=53}}</ref> |
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New specimens are propagated by sowing non-dormant seeds in a 10°C (50°F) greenhouse in the spring under a very light layer of soil. Once the seedlings are large enough to handle (after 1–3 months), they are moved into individual pots. After the last frost of winter, the new plants are moved to their permanent outdoor locations. As an alternative method to seed propagation, [[Cutting (plant)|cuttings]] of semi-hard wood 10–12 long are sometimes taken in the fall. These cuttings are then placed in a frame for the remainder of the fall and winter, and can be replanted the following spring.<ref name=" |
New specimens are propagated by sowing non-dormant seeds in a 10°C (50°F) greenhouse in the spring under a very light layer of soil. Once the seedlings are large enough to handle (after 1–3 months), they are moved into individual pots. After the last frost of winter, the new plants are moved to their permanent outdoor locations. As an alternative method to seed propagation, [[Cutting (plant)|cuttings]] of semi-hard wood 10–12 long are sometimes taken in the fall. These cuttings are then placed in a frame for the remainder of the fall and winter, and can be replanted the following spring.<ref name="pfaf.org" />[[File:Hypericum_androsaemum_Albury_Purple_0zz.jpg|thumb|''Hypericum androsaemum'' 'Albury Purple']] |
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[[File:Hypericum_androsaemum_Glacier_0zz.jpg|thumb|''Hypericum androsaemum'' 'Glacier']] |
[[File:Hypericum_androsaemum_Glacier_0zz.jpg|thumb|''Hypericum androsaemum'' 'Glacier']] |
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==== Cultivars ==== |
==== Cultivars ==== |
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In order to combat the invasive tendencies of ''Hypericum androsaemum'', [[Polyploidy|triploid]] clones of plants with desirable characteristics have been developed by several herbariums.<ref name=" |
In order to combat the invasive tendencies of ''Hypericum androsaemum'', [[Polyploidy|triploid]] clones of plants with desirable characteristics have been developed by several herbariums.<ref name="plants.ces.ncsu.edu">{{Cite web |title=Hypericum androsaemum 'Pollock' (Expressionistic Tutsans, St. John's Wort, Sweet Amber, Tutsans) {{!}} North Carolina Extension Gardener Plant Toolbox |url=https://plants.ces.ncsu.edu/plants/hypericum-androsaemum-pollock/ |access-date=2023-04-07 |website=plants.ces.ncsu.edu}}</ref> These triploid specimens have been shown to have massively reduced male fertility and complete female infertility; in addition, they still produce the large and colorful fruits for which ''H. androsaemum'' is known, and at rates similar to regular diploid plants.<refname="Trueblood-etal">{{Cite journal |last=Trueblood |first=Clara E. |last2=Ranney |first2=Thomas G. |last3=Lynch |first3=Nathan P. |last4=Neal |first4=Joseph C. |last5=Olsen |first5=Richard T. |date=2010-07-01 |title=Evaluating Fertility of Triploid Clones of Hypericum androsaemum L. for Use as Non-invasive Landscape Plants |url=https://journals.ashs.org/hortsci/view/journals/hortsci/45/7/article-p1026.xml |journal=HortScience |language=en-US |volume=45 |issue=7 |pages=1026–1028 |doi=10.21273/HORTSCI.45.7.1026 |issn=0018-5345}}</ref> |
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{| class="wikitable" |
{| class="wikitable" |
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|+Selected cultivars |
|+Selected cultivars |
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|Leaves flushed purple, fruit more red |
|Leaves flushed purple, fruit more red |
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|Also called 'Tedbury Purple'<ref |
|Also called 'Tedbury Purple'<ref "www.missouribotanicalgarden.org"/> |
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!'Glacier' |
!'Glacier' |
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|Leaves with primarily white [[variegation]] |
|Leaves with primarily white [[variegation]] |
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|<ref>{{Cite web |title=PlantFiles: Hypericum, Sweet Amber, Tutsan, St. John's Wort, St. Johnswort |url=https://davesgarden.com/guides/pf/go/76626/ |access-date=2023-04-18 |website=Dave's Garden |language=en}}</ref> |
|<ref name=davesgarden>{{Cite web |title=PlantFiles: Hypericum, Sweet Amber, Tutsan, St. John's Wort, St. Johnswort |url=https://davesgarden.com/guides/pf/go/76626/ |access-date=2023-04-18 |website=Dave's Garden |language=en}}</ref> |
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!'Golden Tutsan' |
!'Golden Tutsan' |
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|Leaves golden |
|Leaves golden |
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|<ref "www.missouribotanicalgarden.org"/> |
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|<ref>{{Cite web |title=Hypericum androsaemum 'Golden Tutsan' - Plant Finder |url=https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=268033&isprofile=1&gen=Hypericum |access-date=2023-04-18 |website=www.missouribotanicalgarden.org}}</ref> |
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|- |
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!'Matisse' |
!'Matisse' |
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|[[North Carolina State University]] |
|[[North Carolina State University]] |
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|Leaves with green and white spotty [[variegation]] |
|Leaves with green and white spotty [[variegation]] |
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|Triploid<ref name=" |
|Triploid<ref name="plants.ces.ncsu.edu" /> |
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|- |
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!'Picasso' |
!'Picasso' |
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== Uses == |
== Uses == |
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Like many other ''Hypericum'' species, ''H. androsaemum'' is a [[Medicinal plants|medicinal plant]] used in [[Traditional medicine|folk medicine]]. For example, it is used as a [[diuretic]], to treat [[sciatica]] and [[gout]], and to stem bleeding and accelerate healing from burns and minor wounds.<ref name=" |
Like many other ''Hypericum'' species, ''H. androsaemum'' is a [[Medicinal plants|medicinal plant]] used in [[Traditional medicine|folk medicine]]. For example, it is used as a [[diuretic]], to treat [[sciatica]] and [[gout]], and to stem bleeding and accelerate healing from burns and minor wounds.<ref name="Parsons-2001" /> Because ''H. androsaemum'' does not contain [[hypericin]], a chemical present in other ''Hypericum'' species that can cause skin irritation and other undesirable side effects, the plant is more widely used in [[Topical medication|topical applications]] and skincare.<ref name=Antognoni>{{Cite journal |last=Antognoni |first=Fabiana |last2=Lianza |first2=Mariacaterina |last3=Poli |first3=Ferruccio |last4=Buccioni |first4=Michela |last5=Santinelli |first5=Claudia |last6=Caprioli |first6=Giovanni |last7=Iannarelli |first7=Romilde |last8=Lupidi |first8=Giulio |last9=Damiani |first9=Elisabetta |last10=Beghelli |first10=Daniela |last11=Alunno |first11=Alessia |last12=Maggi |first12=Filippo |display-authors=3 |date=2017 |title=Polar extracts from the berry-like fruits of Hypericum androsaemum L. as a promising ingredient in skin care formulations |url=http://dx.doi.org/10.1016/j.jep.2016.11.029 |journal=Journal of Ethnopharmacology |volume=195 |pages=255–265 |doi=10.1016/j.jep.2016.11.029 |issn=0378-8741}}</ref> This trait makes the species useful as an [[antidepressant]] as well, and testing has demonstrated that it appears to be at least as effective as ''H. perforatum'' in that regard.<ref name=Ramalhete>{{Cite journal |last=Ramalhete |first=Nuno |last2=Machado |first2=Alexandra |last3=Serrano |first3=Rita |last4=Gomes |first4=Elsa T. |last5=Mota-Filipe |first5=Helder |last6=Silva |first6=Olga |display-authors=3 |date=2016 |title=Comparative study on the in vivo antidepressant activities of the Portuguese Hypericum foliosum, Hypericum androsaemum and Hypericum perforatum medicinal plants |url=http://dx.doi.org/10.1016/j.indcrop.2015.12.014 |journal=Industrial Crops and Products |volume=82 |pages=29–36 |doi=10.1016/j.indcrop.2015.12.014 |issn=0926-6690}}</ref> In Portugal, the leaves are used to treat liver, kidney, and bladder ailments,<ref name=Valentao>{{Cite journal |last=Valentão |first=Patrícia |last2=Fernandes |first2=Eduarda |last3=Carvalho |first3=Félix |last4=Andrade |first4=Paula Branquinho |last5=Seabra |first5=Rosa Maria |last6=Bastos |first6=Maria de Lourdes |display-authors=3 |date=2002 |title=Antioxidant Activity of Hypericum androsaemum Infusion: Scavenging Activity against Superoxide Radical, Hydroxyl Radical and Hypochlorous Acid. |url=http://www.jstage.jst.go.jp/article/bpb/25/10/25_10_1320/_article |journal=Biological and Pharmaceutical Bulletin |language=en |volume=25 |issue=10 |pages=1320–1323 |doi=10.1248/bpb.25.1320 |issn=0918-6158}}</ref> while in England they are mixed with lard to make an ointment to put on cuts or other wounds.<ref name=Aronson>{{Cite journal |last=Aronson |first=Jeff |date=2005-04-01 |title=David E Allen and Gabrielle Hatfield, Medicinal plants in folk tradition: an ethnobotany of Britain and Ireland |url= |journal=Medical History |volume=49 |issue=2 |pages=230–231 |doi=10.1017/s002572730000870x |issn=0025-7273}}</ref> The [[antioxidant]] properties of the berries of ''Hypericum androsaemum'' have been confirmed in laboratory testing, lending credence to their use in teas as [[Antihepatotoxic|antihepatotoxics]] or diuretics.<ref name="Caprioli-2016" /> |
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==References== |
==References== |
Revision as of 11:39, 31 May 2023
Hypericum androsaemum | |
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![]() | |
Habit | |
Scientific classification ![]() | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Rosids |
Order: | Malpighiales |
Family: | Hypericaceae |
Genus: | Hypericum |
Section: | Hypericum sect. Androsaemum |
Species: | H. androsaemum
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Binomial name | |
Hypericum androsaemum | |
Synonyms | |
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Hypericum androsaemum, the shrubby St. John's wort, is a flowering plant in the family Hypericaceae. Commonly called tutsan or sweet-amber, the species is cultivated as an ornamental plant because of its striking red-tinted foliage, bright yellow petals, and its clusters of fruit which are large compared to other members of Hypericum. As such, various cultivars of the species have been bred which amplify its desirable characteristics. These include cultivars like 'Albury Purple' and 'Golden Tutsan' which have leaves with more pronounced purple and golden coloring, respectively.
The plant is native to Western Europe, North Africa and the Middle East, but has been introduced elsewhere in temperate areas with high rainfall, including Australia and New Zealand. In these countries, it is often considered a noxious weed. The plant is easily dispersed across wide ranges because of its small and numerous seeds, and methods for biological control are required to manage the species.
The species has been known since before the modern system of taxonomy was developed, and was first described by Carl Linnaeus in 1763. Since then, it has been invalidly published under several synonyms, and was repeatedly placed in its own genus named Androsaemum. After Norman Robson published his monograph of the genus Hypericum in 1996, the species was definitively placed within Hypericum sect. Androsaemum, a small section including several other closely related species.
Description
Hypericum androsaemum is a small bushy shrub, reaching 30–70 cm (0.98–2.30 ft) tall. It has many stems which remain upright and erect instead of creeping over the ground. It has many oval-shaped leaves along its stems which are typically green with a red tint, and have small glands on their surface that can be seen upon close inspection and are filled with a red pigment. The plant has yellow flowers 1.5 to 2.5 cm in diameter with five petals and numerous stamens.[1] It has berries unique among Hypericum that turn from red to black and remain soft and fleshy even after ripening.[2] The plant's stems are cylindrical in shape when the plant is mature.[2] The bark on the stems has longitudinal grooves or scale-like patterns.[2]
Foliage
![](http://upload.wikimedia.org/wikipedia/commons/thumb/1/18/Hypericum_androsaemum_L.-_Sp._Pl.-_784_%281753%29._20210728_072227.jpg/220px-Hypericum_androsaemum_L.-_Sp._Pl.-_784_%281753%29._20210728_072227.jpg)
The leaves are arranged in opposite pairs without stipules and lack petioles.[1]The leaf blade is 4–12 cm (1.6–4.7 in) long by 2–8 cm (0.79–3.15 in) wide.[2] The leaves lack hairs on either surface and have small oil glands across their surface.[2] When these glands are crushed, they give off a pungent aroma and leak red pigment. [3] There are other translucent glands that are dispersed throughout the mesophyll at differing depths.[4] There are four or five symmetrical pairs of main veins along the leaf that point in the direction of the tip.[2]
Inflorescence
![](http://upload.wikimedia.org/wikipedia/commons/thumb/7/77/Hypericum_androsaemum_sl39.jpg/350px-Hypericum_androsaemum_sl39.jpg)
Hypericum androsaemum has between one and eleven flowers on an inflorescence, which has the form of a cyme and a corymb-like arrangement. There are never accessory flowers, but there are sometimes one to three flowering branches from the lower node. The pedicel stems are 8–14 mm long, with small lance-shaped bracts.[2]
The flowers are 15–25 mm in diameter and have globe-shaped buds. The sepals are very unequal in size, about 6–12 mm long by 3–7 mm wide in an egg shape. The flower petals are a bright golden yellow without the red tinge that is present in the foliage. They curve inward and have an egg-like shape. The stamens are arranged in five fascicles of twenty to twenty-five stamens the longest of which are 7–11 mm long. The ovaries measure 4–5 mm long and 3.5–5 mm wide in the shape of a rough globe.[2]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/d/d8/Hypericum_androsaemum_Dziurawiec_barwierski_fruit_1.jpg/200px-Hypericum_androsaemum_Dziurawiec_barwierski_fruit_1.jpg)
The berries of the plant turn from red to a unique black color not found in any other Hypericum species, which is caused by a xanthone present only in Hypericum androsaemum.[5] Another unique characteristic of the species' berries is that they remain fleshy and mostly soft when they ripen, instead of hardening and drying out like other related species.[5] The berries measure 7–12 mm long and 6–8 mm wide with thin casings. The seeds inside are a reddish-brown color.[2]
Phytochemistry
Hypericum androsaemum has a well-studied phytochemical profile as a result of its use as folk medicine and an herbal supplement. More than eighty essential compounds have been identified from its leaves. The total density of essential oil has been recorded as high as 0.34%. Several different sesquiterpene hydrocarbons dominate the profile, and intermediate and long chain alkenes are highly present. Less prolific compounds include caryophyllene and gurjunene.[6] Many of these essential oils and other phenolic compounds are present in higher quantities while the flowers are still growing.[7] While less studied than the leaves of the plant, the berries of H. androsaemum are rich in chemical constituents as well. Many of these constituents are found in higher densities (or only) while the fruits are red. The most present chemicals are chlorogenic acid, shikimic acid, rutin, epicatechin, and hyperoside.[5]
Taxonomy
Hypericum androsaemum is the type species of the small section Hypericum sect. Androsaemum. The species' placement within Hypericum can be summarized as follows:[8]
- Hypericum subg. Hypericum
- Hypericum sect. Androsaemum
- H. androsaeumum
- H. foliosum
- H. grandifolium
- H. hircinum
- H. × inodorum
- Hypericum sect. Androsaemum
Nomenclature
The genus name Hypericum derives from the Greek words hyper, meaning above, and eikon, meaning picture. This refers to the practice of hanging the flower "above pictures" to ward off evil spirits. The specific epithet androsaemum comes from the Greek word androsaemus, which was used to describe plants with red sap. It is a combination of the words andros, meaning man, and haima, meaning blood.[9] The common name tutsan is French in origin, and derives from the phrase tout-saine, which means heal-all, in reference to the plant's medicinal properties.[3] Its alternative name sweet-amber is in reference to the ambergris-like aroma that is emitted when oil glands on its leaves are crushed.[10]
While Hypericum androsaemum is the most well-known plant named tutsan, other species share that common name. For example, H. xylosteifolium is called "Turkish tutsan" and H. hircinum is called "Stinking tutsan".[7]
History
![](http://upload.wikimedia.org/wikipedia/commons/thumb/e/ed/Hortus_Eystettensis%2C_1640_%28BHL_45339_265%29_-_Classis_Aestiva_113.jpg/200px-Hortus_Eystettensis%2C_1640_%28BHL_45339_265%29_-_Classis_Aestiva_113.jpg)
Hypericum androsaemum was known and studied long before the modern system of taxonomy was developed. For example, tutsan was depicted in the 1640 volume of Hortus Eystettensis, a revolutionary book of botanical illustrations. In the codex, the plant was noted to be from Sicily, of the grouping Hÿpericon (a pre-Linnean version of Hypericum), and called "Androsaemum foeditum" or "Tragôdes".[11] The species was first formally described in the modern system by Carl Linnaeus. He described the species as Hypericum androsaemum in the second volume of his Species Plantarum in 1763 alongside around twenty other Hypericum species. Compiling several brief notes from other authorities, Linnaeus gave the following description for the plant:[12]
In the same entry, Linnaeus noted the species' presence in England and its tendency to be found around fences.[12] This original description and type specimen analysis by Linnaeus remains the basis for the modern definition of the species. However, since that original description numerous illegitimate synonyms have been created for various reasons. In fact, while there is now solid consensus that H. androsaemum belongs within the genus Hypericum,[13] it was placed into a separate genus called Androsaemum as recently as 1893.[14]
In 1796, the garden of Chapel Allerton published a list of their plant specimens, noting Hypericum androsaemum as being in their collection, along with the fact it had been described by Linnaeus. However, they still applied two superfluous names (Androsaemum floridum and Hypericum floridum) to their specimens;[15] these names were never accepted as legitimate.[13] Only one validly published heterotypic synonym for Hypericum androsaemum has arisen since its original description. In 1785, Carlo Allioni published a description of a specimen he called Androsaemum officinale, without referencing Linnaeus' original description of Hypericum androsaemum. Still, the description corroborated with the one given by Linnaeus and there is consensus that the specimen Allioni observed did, in fact, belong to Hypericum androsaemum and was not a separate species.[16]
The status of Hypericum androsaemum was definitively resolved with Norman Robson's comprehensive monograph of the genus Hypericum in 1996. Robson established 36 sections within the genus which grouped together very similar species. He designated H. androsaemum as the type species of sect. Androsaemum and clarified its lectotype specimen. Because the actual type specimen that Linnaeus analyzed was not preserved, Robson selected an illustration from Hortus Cliffortianus, which Linnaeus would have at least seen, to serve as the lectotype for the species.[2]
Name | Typ | Author | Year | Journal | Notes | ||
---|---|---|---|---|---|---|---|
Titel | Vol. | Page | |||||
Androsaemum androsaemum | Homotypic | (L.) Huth | 1893 | Helios | 11 | 133 | Not validly published |
Androsaemum floridum | Homotypic | Salisb. | 1796 | Prodr. Stirp. Chap. Allerton | 369 | Superfluous name | |
Androsaemum officinale | Heterotypic | All. | 1785 | Fl. Pedem. | 2 | 147 | |
Androsaemum vulgare | Homotypic | Gaertn. | 1788 | Fruct. Sem. Pl. | 1 | 282 | |
Hypericum bacciferum | Homotypic | Lam. | 1779 | Fl. Franç. | 3 | 151 | Superfluous name |
Hypericum bacciforme | Homotypic | Bubani | 1901 | Fl. Pyren. | 3 | 343 | Superfluous name |
Hypericum floridum | Homotypic | Salisb. | 1796 | Prodr. Stirp. Chap. Allerto | 369 | ||
Hypericum webbianum | Heterotypic | G.Nicholson | 1894 | Hand-List Trees Shrubs | 1 | 37 | Not validly published |
Subdivision
Hypericum androsaemum exhibits a great deal of variation in appearance, especially in cultivation. When this variation is deliberately brought out through selective breeding, the resulting forms are called "cultivars"; however, when populations develop unique traits on their own while in cultivation, those populations can be described by a legitimate botanical name. In the case of H. androsaemum, two such names have been given: H. androsaemum var. aureum has yellow-green leaves, and H. androsaemum f. variegatum has variegated leaves.[2]
In the wild, H. androsaemum exhibits a similarly wide range of physical traits. Larger-flowered plants tend to have red-tinted leaves and larger fruits; smaller-flowered plants have greener leaves and smaller fruits. These traits are not binary, though, and there is a continuous spectrum of forms that link those two extremes wherever they are found. Thus, no legitimate names are given to any of these forms.[2]
Similar species
Hypericum androsaemum is similar in appearance to the other species in section Androsaemum. It can be told apart from H. foliosum and H. × inodorum by its shorter styles, the unique black color of its ripe berries, and that its petals are never longer than its sepals.[2] In addition to the species of section Androsaemum, it is highly similar to Hypericum xylosteifolium, the sole species in section Inodorum. The most apparent morphological difference between it and H. xylosteifolium is that the seed capsules (berries) of the latter species dry completely when they are mature, whereas those of H. androsaemum remain soft and fleshy.[7] The berries of H. androsaemum only dry if they are left on the plant for around a month after ripening, and will begin to wither at that same time.[2]
- Comparison of inflorescences of related species
-
H. foliosum
-
H. × inodorum
-
H. androsaemum
Habitat
Hypericum androsaemum is found in damp and shady areas at a great range of elevations, from low-lying regions up to 1,800 m (5,900 ft).[2] It requires heavy rainfall, typically greater than 750 mm (30 in) of annual precipitation.[3]
Distribution
The species has a wide native distribution, but is most densely found in Western Europe. It is particularly abundant across the British Isles (except for in the Scottish Highlands), in the Ardennes forest of Belgium and France, and on the western French coast. Other European populations include the Pyrenees Mountains, across northern Spain and Portugal, and around Genoa and parts of central Italy. Scattered sightings have been reported through Germany and as far north as Denmark, as well as in Switzerland, Austria, and the Balkans. Outside of Europe, H. androsaemum is found in northern Turkey, the North African coast, the Caucasus, and Iran. While it may have at one point been native to the island of Corsica, it is now believed to be extinct there.[2]
Hypericum androsaemum has become naturalized or invasive in regions to which it is not native. In Australia, it is densely found in the Otway Ranges, South Gippsland Hills, Dandenong Ranges, the Blue Mountains, and in the area around Mansfield. There are also a few scattered populations on Tasmania, but it is not troublesome there. In New Zealand, it is found on both islands frequently enough to be an encroaching weed.[3]
Invasiveness
In the late 19th century, H. androsaemum was a popular ornamental plant, leading to its widespread dispersal in non-native regions. While its seeds don't have any special properties that increase their potential for dispersal, they are small and extremely numerous. This allows the seeds to easily contaminate cargo, animals, clothing, vehicles, or other transported items. The species was invasively introduced to Australia in 1865 via the Royal Horticultural Society's botanical garden in Hobart, apparently for use as an ornamental species because of its reddish leaves and bright yellow flowers. In New Zealand, the primary method of invasive dispersal is reportedly by birds.[3]
In 2008, Landcare Research began investigating the feasibility of a biological control for the species. The seed and leaf-tip eating moth Lathronympha strigana and the leaf-feeding beetle Chrysolina abchasica were tested and found to be sufficiently host specific and not a risk to native plant species. As of February 2017, moths were released at 30 sites around the central North Island in New Zealand; however, the beetle is more difficult to rear in captivity, so only one release has been made so far.[17]
Ecology
![](http://upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Millepertuis_andros%C3%A8me-Longicorne-201607013.jpg/200px-Millepertuis_andros%C3%A8me-Longicorne-201607013.jpg)
Seeds of Hypericum androsaemum germinate in the fall. They flower when the plant is between 18–24 months old, typically from late spring to early summer, with the fruit ripening by late summer. The plant is partially deciduous, losing most of its foliage in the fall but with rapid regrowth every spring.[3]
Cultivation
When cultivated, Hypericum androsaemum requires minimal maintenance. The species is generally pest and disease free, and is deer resistant.[18] However, it can be prone to nematodes which cause root rot; pest insects such as thrips and scale have been noted. Additionally, in hot and humid climates the species is susceptible to wilting and unrelated root rot.[10] It is tolerant of moderately acidic and alkaline soils, and can withstand drought and freezing temperatures down to -20° C (-4° F). While the plant performs best if spaced roughly 90 cm (3.0 ft) apart from others, it will self-sow via seed in its area if allowed, creating ground cover. After the plant has lost its leaves in the fall, it can be cut back if needed and will regrow from the base in the spring.[19]
Most Hypericum species are difficult to germinate because of heavy seed dormancy. Hypericum androsaemum exhibits both physiological dormancy and chemical dormancy, meaning that seed germination can be kickstarted by both physical and chemical factors. In particular, room-temperature water or the plant hormone gibberellic acid were most effective at bringing its seeds out of a dormant state.[20]
New specimens are propagated by sowing non-dormant seeds in a 10°C (50°F) greenhouse in the spring under a very light layer of soil. Once the seedlings are large enough to handle (after 1–3 months), they are moved into individual pots. After the last frost of winter, the new plants are moved to their permanent outdoor locations. As an alternative method to seed propagation, cuttings of semi-hard wood 10–12 long are sometimes taken in the fall. These cuttings are then placed in a frame for the remainder of the fall and winter, and can be replanted the following spring.[19]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/1/10/Hypericum_androsaemum_Albury_Purple_0zz.jpg/220px-Hypericum_androsaemum_Albury_Purple_0zz.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/2/2e/Hypericum_androsaemum_Glacier_0zz.jpg/220px-Hypericum_androsaemum_Glacier_0zz.jpg)
Cultivars
In order to combat the invasive tendencies of Hypericum androsaemum, triploid clones of plants with desirable characteristics have been developed by several herbariums.[21] These triploid specimens have been shown to have massively reduced male fertility and complete female infertility; in addition, they still produce the large and colorful fruits for which H. androsaemum is known, and at rates similar to regular diploid plants.<refname="Trueblood-etal">Trueblood, Clara E.; Ranney, Thomas G.; Lynch, Nathan P.; Neal, Joseph C.; Olsen, Richard T. (2010-07-01). "Evaluating Fertility of Triploid Clones of Hypericum androsaemum L. for Use as Non-invasive Landscape Plants". HortScience. 45 (7): 1026–1028. doi:10.21273/HORTSCI.45.7.1026. ISSN 0018-5345.</ref>
Name | Creator | Characteristics | Notes |
---|---|---|---|
'Albury Purple' | Leaves flushed purple, fruit more red | Also called 'Tedbury Purple'Cite error: The opening <ref> tag is malformed or has a bad name (see the help page).
| |
'Glacier' | Leaves with primarily white variegation | [22] | |
'Golden Tutsan' | Leaves golden | Cite error: The opening <ref> tag is malformed or has a bad name (see the help page).
| |
'Matisse' | North Carolina State University | Leaves with green and white spotty variegation | Triploid[21] |
'Picasso' | North Carolina State University | Leaves with purple tint | Triploid[23] |
'Pollock' | North Carolina State University | Leaves with abstract color patterns | Triploid[24] |
Uses
Like many other Hypericum species, H. androsaemum is a medicinal plant used in folk medicine. For example, it is used as a diuretic, to treat sciatica and gout, and to stem bleeding and accelerate healing from burns and minor wounds.[3] Because H. androsaemum does not contain hypericin, a chemical present in other Hypericum species that can cause skin irritation and other undesirable side effects, the plant is more widely used in topical applications and skincare.[25] This trait makes the species useful as an antidepressant as well, and testing has demonstrated that it appears to be at least as effective as H. perforatum in that regard.[26] In Portugal, the leaves are used to treat liver, kidney, and bladder ailments,[27] while in England they are mixed with lard to make an ointment to put on cuts or other wounds.[28] The antioxidant properties of the berries of Hypericum androsaemum have been confirmed in laboratory testing, lending credence to their use in teas as antihepatotoxics or diuretics.[5]
References
- ^ a b Stace, C. A. (2019). New Flora of the British Isles (Fourth ed.). Middlewood Green, Suffolk, U.K.: C & M Floristics. ISBN 978-1-5272-2630-2.
- ^ a b c d e f g h i j k l m n o p Robson, Norman (1985). Studies in the genus Hypericum L. (Guttiferae): 3. Sections: 1. Campylosporus to: 6a. Umbraculoides. Bulletin of the British Museum (Natural History). ISBN 0565080032.
- ^ a b c d e f g Parsons, W. T. (2001). Noxious weeds of Australia. E. G. Cuthbertson (2nd ed.). Collingwood, VIC, Australia: CSIRO Pub. pp. 384–385. ISBN 0-643-06514-8. OCLC 46774815.
- ^ Perrone, Rosaria; Rosa, Paolode; Castro, Olgade; Colombo, Paolo (2013-10-01). "Leaf and stem anatomy in eight Hypericum species (Clusiaceae)". Acta Botanica Croatica. 72 (2): 269–286. doi:10.2478/botcro-2013-0008. ISSN 0365-0588.
- ^ a b c d Caprioli, Giovanni; Alunno, Alessia; Beghelli, Daniela; et al. (2016). "Polar Constituents and Biological Activity of the Berry-Like Fruits from Hypericum androsaemum L." Frontiers in Plant Science. 7. doi:10.3389/fpls.2016.00232/full. ISSN 1664-462X.
{{cite journal}}
: CS1 maint: unflagged free DOI (link) - ^ Guedes, Ana P.; Amorim, Lúcia R.; Vicente, Ana; Fernandes-Ferreira, M. (2004). "Variation of the essential oil content and composition in leaves from cultivated plants ofHypericum androsaemum L." Phytochemical Analysis. 15 (3): 146–151. doi:10.1002/pca.758. ISSN 0958-0344.
- ^ a b c Cirak, Cuneyt; Seyis, Fatih; Özcan, Aysel; Yurteri, Emine (2022-06-01). "Ontogenetic changes in phenolic contents and volatile composition of Hypericum androsaemum and Hypericum xylosteifolium". Biochemical Systematics and Ecology. 102: 104429. doi:10.1016/j.bse.2022.104429. ISSN 0305-1978.
- ^ "sect. Androsaemum [(Duhamel) Godron ]". hypericum.myspecies.info. Retrieved 2023-04-21.
- ^ "Hypericum androsaemum | Landscape Plants | Oregon State University". landscapeplants.oregonstate.edu. Retrieved 2023-04-07.
- ^ a b "Hypericum androsaemum - Plant Finder". www.missouribotanicalgarden.org. Retrieved 2023-04-16.
- ^ Besler, Basilius (1640). Hortus Eystettensis, sive, Diligens et accurata omnium plantarum, florum, stirpium : ex variis orbis terrae partibus, singulari studio collectarum, quae in celeberrimis viridariis arcem episcopalem ibidem cingentibus, olim conspiciebantur delineatio et ad vivum repraesentatio et advivum repraesentatio opera. [Nürnberg?: s.n.]
- ^ a b Linné, Carl von; Salvius, Lars (1753). Caroli Linnaei ... Species plantarum :exhibentes plantas rite cognitas, ad genera relatas, cum differentiis specificis, nominibus trivialibus, synonymis selectis, locis natalibus, secundum systema sexuale digestas... (in Latin). Vol. 2. Holmiae: Impensis Laurentii Salvii. p. 783.
- ^ a b c "Hypericum androsaemum L." Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2023-04-21.
- ^ Moldenke, Harold N. (1932). "A Discussion of Tautonyms". Bulletin of the Torrey Botanical Club. 59 (3): 142. doi:10.2307/2480467. ISSN 0040-9618.
- ^ Salisbury, R. A. (1796). Prodromus stirpium in horto ad Chapel Allerton vigentium. Londini: [s.n.]
- ^ Zumaglini, Antonio Mauritio (1849). Flora Pedemontana : sive Species plantarum Phanerogamarum in Pedemonte et Liguria sponte nascentium ... Vol. 1. Augustae Taurinorum [Torino]: J. Favale.
- ^ Hugh Gourlay. "Tutsan Agents Released". landcareresearch.co.nz.
- ^ "Hypericum androsaemum (Sweet Amber)". Gardenia.net. Retrieved 2023-04-07.
- ^ a b , "Hypericum androsaemum Tutsan, Sweet-amber, St. Johnswort PFAF Plant Database". pfaf.org. Retrieved 2023-04-07.
- ^ Çýrak, Cüneyt (2006). "Physiological and Physical Seed Dormancy of some Hypericum Species Growing in Turkey". Plant Breeding and Seed Science. 53.
- ^ a b "Hypericum androsaemum 'Pollock' (Expressionistic Tutsans, St. John's Wort, Sweet Amber, Tutsans) | North Carolina Extension Gardener Plant Toolbox". plants.ces.ncsu.edu. Retrieved 2023-04-07.
- ^ "PlantFiles: Hypericum, Sweet Amber, Tutsan, St. John's Wort, St. Johnswort". Dave's Garden. Retrieved 2023-04-18.
- ^ "Hypericum androsaemum 'Matisse' (Expressionistic Tutsans, St. John's Wort, Sweet Amber, Tutsans) | North Carolina Extension Gardener Plant Toolbox". plants.ces.ncsu.edu. Retrieved 2023-04-16.
- ^ "Hypericum androsaemum 'Picasso' (Expressionistic Tutsans, St. John's Wort, Sweet Amber, Tutsans) | North Carolina Extension Gardener Plant Toolbox". plants.ces.ncsu.edu. Retrieved 2023-04-16.
- ^ Antognoni, Fabiana; Lianza, Mariacaterina; Poli, Ferruccio; et al. (2017). "Polar extracts from the berry-like fruits of Hypericum androsaemum L. as a promising ingredient in skin care formulations". Journal of Ethnopharmacology. 195: 255–265. doi:10.1016/j.jep.2016.11.029. ISSN 0378-8741.
- ^ Ramalhete, Nuno; Machado, Alexandra; Serrano, Rita; et al. (2016). "Comparative study on the in vivo antidepressant activities of the Portuguese Hypericum foliosum, Hypericum androsaemum and Hypericum perforatum medicinal plants". Industrial Crops and Products. 82: 29–36. doi:10.1016/j.indcrop.2015.12.014. ISSN 0926-6690.
- ^ Valentão, Patrícia; Fernandes, Eduarda; Carvalho, Félix; et al. (2002). "Antioxidant Activity of Hypericum androsaemum Infusion: Scavenging Activity against Superoxide Radical, Hydroxyl Radical and Hypochlorous Acid". Biological and Pharmaceutical Bulletin. 25 (10): 1320–1323. doi:10.1248/bpb.25.1320. ISSN 0918-6158.
- ^ Aronson, Jeff (2005-04-01). "David E Allen and Gabrielle Hatfield, Medicinal plants in folk tradition: an ethnobotany of Britain and Ireland". Medical History. 49 (2): 230–231. doi:10.1017/s002572730000870x. ISSN 0025-7273.