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Bidens biternata
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Photo: Bart Wursten
Cleveland Dam, Harare, area below dam wall
Photo: Bart Wursten
Cleveland Dam, Harare, area below dam wall
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| Synonyms: |
Bidens cylindrica Sherff |
| Common names: | Yellow-flowered blackjack (English) |
| Frequency: | Frequent |
| Status: | Possibly native? |
| Description: |
Erect annual herb, up to 1 m. It can be distinguished by the leaves, which are usually 5-7 foliolate, the basal pair sometimes further divided. The flowers are yellow, including the ray-florets. In B. pilosa, the leaves are 3-foliolate and the ray-florets, if present, are white. B. biternata is much less frequent in occurrence. |
| Notes: | Believed to be indigenous, this is another weedy species, quite similar to two other weedy aliens Bidens pilosa and to Bidens bipinnata. B. pilosa differs from B. biternata in possessing 3-foliolate leaves and white (or no) ray florets; B. bipinnata differs in the 2-pinnatisect leaves. |
| Derivation of specific name: | |
| Habitat: | A widespread weed of disturbed and cultivated areas. |
| Altitude range: (metres) | |
| Flowering time: | |
| Worldwide distribution: | Widespread in tropical and subtropical Africa, Asia and Australia. |
| Zimbabwe distribution: | N,W,C,E,S |
| Growth form(s): | |
| Endemic status: | |
| Red data list status: | |
| Insects associated with this species: | |
| Spot characters: | Display spot characters for this species |
| Images last updated: | Wednesday 26 April 2006 |
| Literature: |
Beentje, H.J. & Ghazanfar, S.A. (eds.) (2005). Compositae (Part 3) Flora of Tropical East Africa Pages 804 - 806. Burrows, J.E. & Willis, C.K. (eds) (2005). Plants of the Nyika Plateau Southern African Botanical Diversity Network Report No. 31 SABONET, Pretoria Page 82. Chapano, C. & Mugarisanwa, N.H. (2003). Plants of the Matobo District National Herbarium and Botanic Garden, Zimbabwe Page 6. Da Silva, M.C., Izidine, S. & Amude, A.B. (2004). A preliminary checklist of the vascular plants of Mozambique. Southern African Botanical Diversity Network Report No. 30 Sabonet, Pretoria Page 146. Heath, A. & Heath, R. (2009). Field Guide to the Plants of Northern Botswana including the Okavango Delta Kew Publishing Page 204. (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. Phiri, P.S.M. (2005). A Checklist of Zambian Vascular Plants Southern African Botanical Diversity Network Report No. 32 Page 28. Setshogo, M.P. (2005). Preliminary checklist of the plants of Botswana. Sabonet Report no. 37. Sabonet, Pretoria and Gaborone Page 31. Strugnell, A.M. (2006). A Checklist of the Spermatophytes of Mount Mulanje, Malawi Scripta Botanica Belgica 34 National Botanic Garden of Belgium Page 51. Wild, H. (1955). Common Rhodesian Weeds Government of Rhodesia, Salisbury Page 63. (Includes a picture). Wild, H. (1967). The Compositae of the Flora Zambesiaca area. 1. Heliantheae. Kirkia 6(1) Pages 25 - 27. also as Bidens cylindrica |
Other sources of information about Bidens biternata:
Our websites:
Flora of Botswana: Bidens biternataFlora of Burundi: Bidens biternata
Flora of Caprivi: Bidens biternata
Flora of Malawi: Bidens biternata
Flora of Mozambique: Bidens biternata
Flora of Zambia: Bidens biternata
External websites:
African Plants: A Photo Guide (Senckenberg): Bidens biternataBHL (Biodiversity Heritage Library): Bidens biternata
EOL (Encyclopedia of Life): Bidens biternata
GBIF (Global Biodiversity Information Facility): Bidens biternata
Google: Web - Images - Scholar
iNaturalist: Bidens biternata
IPNI (International Plant Names Index): Bidens biternata
JSTOR Plant Science: Bidens biternata
Mansfeld World Database of Agricultural and Horticultural Crops: Bidens biternata
Plants of the World Online: Bidens biternata
Tropicos: Bidens biternata
Wikipedia: Bidens biternata
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