Whorl (botany): Difference between revisions

Browse history interactively

← Previous edit

Content deleted Content added

VisualWikitext

Revision as of 03:43, 2 July 2020 edit 2601:199:c201:fd70:85d9:b572:e9a4:2603 (talk) “ single point{{vague\|see talk}}” Tags: Mobile edit Mobile web edit ← Previous edit		Latest revision as of 18:31, 24 March 2024 edit undo DavidBrooks (talk \| contribs) Extended confirmed users 19,560 edits Reverted 1 edit by 2601:589:C400:9400:4C2:7450:9617:90A7 (talk): Not according to reliable sources Tags: Twinkle Undo
(18 intermediate revisions by 15 users not shown)
Line 1: {{Short description\|Arrangement of plant parts around the stem}} [[File:Photograph and axial plane floral diagram of Friesodielsia desmoides.jpg\|thumb\|Photograph and axial plane floral diagram of ''[[Friesodielsia desmoides]]'', showing the [[whorl]]ed pattern of multiple [[concentric objects]].]] [[File:MichiganLilyStem.jpg\|thumb\|Leaf whorls on a [[herbaceous]] ''[[Lilium michiganense]]'']] [[File:Brabejum stellatifolium - new growth.JPG\|thumb\|Leaf whorls on a woody tree, ''[[Brabejum stellatifolium]]'']] In botany, a '''whorl''' (or '''verticil''') is ana [[whorled]] arrangement of [[Leaf\|leaves]], [[sepal]]s, [[petal]]s, [[stamen]]s, or~~{{dubious~~ [[Gynoecium#Carpels\|carpels]] that radiate from a single point~~{{vague\|see talk}}~~ and surround or wrap around the stem or stalk.<ref>{{cite web\|url=http://www.thefreedictionary.com/whorl\|title=whorl\|publisher=thedictionary\|~~accessdate~~access-date=19 August 2012}}</ref><ref>Lindley, John. ''[https://books.google.com/books?id=c0k-AAAAcAAJ&pg=PR100~~#v=onepage&f=false~~ A Glossary of Technical Terms Used in Botany]'', p.100, Bradbury and Evans, London, 1848.</ref> A leaf whorl consists of at least three elements; a pair of [[opposite leaves]] is not called a whorl. For leaves to grow in whorls is fairly ~~unusual~~rare except in plant species with very short [[Plant stem\|internodes]] and some other genera (''[[Galium]]'', ''[[Nerium]]'', ''[[Elodea]]'' etc.). Leaf whorls occur in some trees such as ''[[Brabejum stellatifolium]]'' and other species in the family [[Proteaceae]] (e.g., in the genus ''[[Banksia]]''). In plants such as these, crowded internodes within the leaf whorls alternate with long internodes between the whorls.▼ The [[Morphology (biology)\|morphology]] of most [[flowering plant]]s is based on four types of whorls:▼ ▲The [[Morphology (biology)\|morphology]] of most [[~~flowering~~flower]]s (called [[cyclic ~~plant~~flower]]s) is based on four types of whorls: # The [[Sepal\|calyx]]: zero or more whorls of sepals at the base # The [[Petal\|corolla]]: zero or more whorls of petals above the calyx Line 10 ⟶ 13: # The [[gynoecium]]: zero or more whorls of carpels, each consisting of an [[Ovary (botany)\|ovary]], a [[Stigma_(botany)#Style\|style]], and a [[Stigma (botany)\|stigma]] A flower lacking any of these floral structures is said to be ''incomplete'' or ''imperfect''.<ref>{{cite book\|author1=Beentje, H. \|author2=Williamson, J. \|year=2010\|title=The Kew Plant Glossary: an Illustrated Dictionary of Plant Terms\|publisher=Kew Publishing\|location=Royal Botanic Gardens, Kew}}</ref> Not all flowers consist of whorls since the parts may instead be spirally arranged, as in the family [[Magnoliaceae]]. ▲For leaves to grow in whorls is fairly unusual except in plant species with very short [[Plant stem\|internodes]]. Leaf whorls occur in some trees such as ''[[Brabejum stellatifolium]]'' and other species in the family [[Proteaceae]] (e.g., in the genus ''[[Banksia]]''). In plants such as these, crowded internodes within the leaf whorls alternate with long internodes between the whorls. ==See also== Line 27 ⟶ 28: {{~~botany~~plant-morphology-stub}}