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Cosmos (plant)

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For other uses, see Cosmos (disambiguation).

Cosmos
Cosmos bipinnatus
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Subfamily: Asteroideae
Tribe: Coreopsideae
Genus: Cosmos
Cav.[1]
Synonyms[2]
  • Cosmea Willd.
  • Adenolepis Less.
  • Cosmus Pers.
  • Cosmos sect. Eucosmos Sherff
  • Gosmos Motomi Ito, spelling variant, apparently accidental

Cosmos is a genus, with the same common name of cosmos, consisting of flowering plants in the sunflower family.[3][4]

Description

Cosmos are herbaceous perennial plants or annual plants growing 0.3–2 m (1 ft 0 in – 6 ft 7 in) tall. The leaves are simple, pinnate, or bipinnate, and arranged in opposite pairs. The flowers are produced in a capitulum with a ring of broad ray florets and a center of disc florets; flower color is very variable between the different species. The genus includes several ornamental plants popular in gardens. Numerous hybrids and cultivars have been selected and named.

Distribution

Cosmos species are native to scrub and meadowland in Mexico where most of the species occur. In the United States, some varieties may be found as far north as the Olympic Peninsula in Washington, but the range also extends through Central America to South America as far south as Paraguay[citation needed]. One species, C. bipinnatus, is naturalized across much of the eastern United States and eastern Canada.[5]

It is also widespread over the high eastern plains of South Africa, where it was introduced via contaminated horsefeed during the Anglo-Boer War.[6]

Species

Cosmos flowers in Showa Memorial Park, Japan
Cosmos and a girl
Cosmos sulphureus
Accepted species[2]
  • Yellow cosmos flower in Kerala, India
    Yellow cosmos flower in Kerala, India
  • Yellow-orange cosmos, Kerala, India
    Yellow-orange cosmos, Kerala, India
  • Cosmos and old house in Japan
    Cosmos and old house in Japan
  • Cosmos flower in Korea
    Cosmos flower in Korea
  • Cosmos atrosanguineus, the chocolate cosmos
    Cosmos atrosanguineus, the chocolate cosmos

References

  1. ^ "Genus Cosmos Cav". Germplasm Resources Information Network. United States Department of Agriculture. 1998-09-07. Archived from the original on 2015-09-24. Retrieved 2011-02-13.
  2. ^ a b Flann, C (ed) 2009+ Global Compositae Checklist
  3. ^ Cavanilles, Antonio José. 1791. Icones et Descriptiones Plantarum 1(1): 9–10, pl. 14
  4. ^ Tropicos, Cosmos Cav.
  5. ^ Biota of North America Program 2013 county distribution maps
  6. ^ Sandys, Celia (2009). Chasing Churchill: The Travels of Winston Churchill. Hachette UK. p. 92. ISBN 978-0786740154. The South African Light Horse, having no baggage train and living largely off the country, were able to range widely across Natal. How widely can be seen from the spread of the beautiful pink cosmos flower, a native of Argentina which was imported into South Africa in the British Army's horse fodder. Just as cairns on the battlefields mark where soldiers fell, so their route is marked by the pink swathes of cosmos. As my children picked bunches of these lovely flowers for me I wondered if the seeds from which they originated had germinated in the belly of my grandfather's horse as he had ridden that way.


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