Helianthus annuus L.

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Helianthus annuus

Picture: Mark Hyde
25, Trafalgar Avenue, Sentosa, Harare

Helianthus annuus

Picture: Mark Hyde
25, Trafalgar Avenue, Sentosa, Harare

Helianthus annuus

Picture: Mark Hyde
25, Trafalgar Avenue, Sentosa, Harare

Helianthus annuus

Picture: Mark Hyde
25, Trafalgar Avenue, Sentosa, Harare

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

Synonyms:
Common names:
Frequency: Occasional
Status: Introduced
Description:
Robust roughly-hairy annual up to 3(-4) m. Leaves alternate, long-petiolate, broadly lanceolate to ovate, acute or acuminate. Phyllaries ovate or ovate-lanceolate, ciliate. Capitula extremely large, up to 35 cm in diameter; disk florets brownish-purple. Ray-florets yellow.
Type location:
Notes:
Derivation of specific name: annuus: annual
Habitat: Mainly found along roadsides, probably from seeds fallen during transport.
Altitude range:
Flowering time:
Worldwide distribution: Domesticated from native American stock and cultivated all over the world for its edible oils and seeds. It is occasionally found naturalized along roadsides.
Zambian distribution (Flora Zambesiaca):
Zambian distribution (Provinces):
Growth form(s):
Endemic status:
Red data list status:
Insects associated with this species: Agonoscelis versicoloratus (Minor pest, feeding on seeds)
Spot characters: Display spot characters for this species
Content last updated: Sunday 4 June 2017
Literature:

Bailey, L.H. (1949). Manual of Cultivated Plants Revised edition. Macmillan, New York. Page 998.

Bandeira, S., Bolnick, D. & Barbosa, F. (2007). Wild Flowers of Southern Mozambique Universidade Eduardo Mondlane, Maputo, Mozambique Pages 211 - 212. Helianthus annuus lenticularis argophyllus (Includes a picture).

Beentje, H.J. & Ghazanfar, S.A. (eds.) (2005). Compositae (Part 3) Flora of Tropical East Africa Pages 706 - 707. (Includes a picture).

Other sources of information about Helianthus annuus:

Our websites:

Flora of Mozambique: Helianthus annuus
Flora of Zimbabwe: Helianthus annuus
Flora of Zimbabwe: cultivated Helianthus annuus

External websites:

African Plants: A Photo Guide (Senckenberg): Helianthus annuus
African Plant Database: Helianthus annuus
BHL (Biodiversity Heritage Library): Helianthus annuus
EOL (Encyclopedia of Life): Helianthus annuus
GBIF (Global Biodiversity Information Facility): Helianthus annuus
Google: Web - Images - Scholar
iNaturalist: Helianthus annuus
IPNI (International Plant Names Index): Helianthus annuus
JSTOR Plant Science: Helianthus annuus
Mansfeld World Database of Agricultural and Horticultural Crops: Helianthus annuus
Plants of the World Online: Helianthus annuus
Tropicos: Helianthus annuus
Wikipedia: Helianthus annuus


Copyright: Mike Bingham, Annette Willemen, Bart Wursten, Petra Ballings and Mark Hyde, 2011-24

Bingham, M.G., Willemen, A., Wursten, B.T., Ballings, P. and Hyde, M.A. (2024). Flora of Zambia: Species information: Helianthus annuus.
https://www.zambiaflora.com/speciesdata/species.php?species_id=160480, retrieved 28 March 2024

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