Cosmos sulphureus Cav.

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Cosmos sulphureus

Photo: Mark Hyde
By Harare to Mutoko Rd

Cosmos sulphureus

Photo: Mark Hyde
By Harare to Mutoko Rd

Cosmos sulphureus

Photo: Bart Wursten
Roadside near Marondera

Cosmos sulphureus

Photo: Bart Wursten
Roadside near Marondera

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Species details: Click on each item to see an explanation of that item (Note: opens a new window)

Synonyms: Bidens sulphurea (Cav.) Sch. Bip.
Common names: Yellow cosmos (English)
Frequency: Local
Status: Introduced
Description:
Annual herb to c.1.2 m with 4-angled sparsely hispid stems. Leaves: lamina ovate in outline, dissected, with ultimate segments 2-4 mm wide, narrowly oblong and apiculate, glabrous. Capitula c.1.5 cm in diameter (excluding rays). Phyllaries: outer green, acuminate; inner with membranous margins. Receptacular scales c.9 mm. Rays up to 3 cm, c.10, bright orange; apex 3-dentate. Disk florets orange-yellow. Achenes c. 20 mm (including a scabrid beak c.7 mm but excluding the pappus), blackish. Pappus of 2 horizontally spreading setae with retrorsely directed barbs.
Notes: Probably originally cultivated for ornament and now an occasional escape. Like a yellow or orange-flowered Cosmos in appearance and occurring in similar habitats to that species, but much less common.
Derivation of specific name: sulphureus: pale yellow, sulphur-yellow (not the colour of this species)
Habitat: Disturbed places; most often seen on roadside verges
Altitude range: (metres)
Flowering time:Mar - Apr
Worldwide distribution: Mexico
Zimbabwe distribution: N,C,E
Growth form(s):
Endemic status:
Red data list status:
Insects associated with this species: spilosoma lineata (Larval foodplant)
Spot characters: Display spot characters for this species
Images last updated: Monday 19 March 2007
Literature:

Beentje, H.J. & Ghazanfar, S.A. (eds.) (2005). Compositae (Part 3) Flora of Tropical East Africa Pages 808 - 810. (Includes a picture).

Mapaura, A. & Timberlake, J. (eds) (2004). A checklist of Zimbabwean vascular plants Southern African Botanical Diversity Network Report No. 33 Sabonet, Pretoria and Harare Page 23. as Bidens suphureus

Wild, H. (1967). The Compositae of the Flora Zambesiaca area. 1. Heliantheae. Kirkia 6(1) Pages 33 - 34. as Bidens sulphurea


Other sources of information about Cosmos sulphureus:

Our websites:

Flora of Zambia: Cosmos sulphureus
Flora of Zimbabwe: cultivated Cosmos sulphureus

External websites:

African Plants: A Photo Guide (Senckenberg): Cosmos sulphureus
African Plant Database: Cosmos sulphureus
Biodiversity Explorer (Biodiversity of southern Africa): Cosmos sulphureus
BHL (Biodiversity Heritage Library): Cosmos sulphureus
EOL (Encyclopedia of Life): Cosmos sulphureus
ePIC (electronic Plant Information Center): Cosmos sulphureus
Flora Zambesiaca web site: Cosmos sulphureus
GBIF (Global Biodiversity Information Facility): Cosmos sulphureus
Google: Web - Images - Scholar
GRIN (Germplasm Resources Information Network): Cosmos sulphureus
IPNI (International Plant Names Index): Cosmos sulphureus
Ispot Southern Africa: Cosmos sulphureus
JSTOR Plant Science: Cosmos sulphureus
Kew Herbarium catalogue: Cosmos sulphureus
Mansfeld World Database of Agricultural and Horticultural Crops: Cosmos sulphureus
The Plant List (version 1.1): Cosmos sulphureus
Tropicos: Cosmos sulphureus


Copyright: Mark Hyde, Bart Wursten, Petra Ballings and Meg Coates Palgrave, 2002-18

Hyde, M.A., Wursten, B.T., Ballings, P. & Coates Palgrave, M. (2018). Flora of Zimbabwe: Species information: Cosmos sulphureus.
https://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=160680, retrieved 23 July 2018

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