9237.000 Bidens
Beentje, H.J. & Ghazanfar, S.A. (eds.) (2005) Compositae (Part 3) Flora of Tropical East Africa
Tadesse, M. (1993) An Account of Bidens (Compositae: Heliantheae) for Africa Kew Bulletin 48(3) 437-516
Wild, H. (1967) The Compositae of the Flora Zambesiaca area. 1. Heliantheae. Kirkia 6(1) 1-62
Description of the genus
Annual or perennial herbs. Leaves opposite, divided or compound, namely 2-3-pinnatisect, 3-foliolate or pinnate. Leaflets or lobes varying from linear to broadly ovate. Capitula usually radiate. Phyllaries in 2 series; outer herbaceous, inner usually scarious. Receptacular scales present. Ray florets neuter, sometimes 0; disk florets bisexual. Rays yellow, orange, golden, white or 0. Achenes bilaterally flattened or 3-4(-5)-angled, linear to broadly obovate; margin often thickened or winged. Pappus of 0-5 barbed (forwardly or backwardly) bristles. Worldwide: 340 species, cosmopolitan, most in the New World but 63 species in Africa. Zimbabwe: 0 cultivated taxa. |
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Other sources of information about Bidens:
External websites:
African Plants: A Photo Guide (Senckenberg): BidensBHL (Biodiversity Heritage Library): Bidens
EOL (Encyclopedia of Life): Bidens
GBIF (Global Biodiversity Information Facility): Bidens
Google: Web - Images - Scholar
iNaturalist: Bidens
IPNI (International Plant Names Index): Bidens
JSTOR Plant Science: Bidens
Mansfeld World Database of Agricultural and Horticultural Crops: Bidens
Plants of the World Online: Bidens
Tropicos: Bidens
Wikipedia: Bidens