Bidens biternata (Lour.) Merr. & Sherff

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Bidens biternata

Photo: Bart Wursten
Cleveland Dam, area below dam wall

Bidens biternata

Photo: Bart Wursten
Cleveland Dam, area below dam wall

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

Synonyms: Bidens cylindrica Sherff
Common names: Yellow-flowered blackjack (English)
Frequency: Frequent
Status: Probably 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:
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:

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.

Heath, A. & Heath, R. (2009). Field Guide to the Plants of Northern Botswana including the Okavango Delta Kew Publishing Page 204. (Includes a picture).

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. (1967). The Compositae of the Flora Zambesiaca area. 1. Heliantheae. Kirkia 6(1) Pages 25 - 27. also as Bidens cylindrica

Wild, H. (undated, c. 1955). Common Rhodesian Weeds ?Government of Rhodesia, Salisbury Page 63. (Includes a picture).


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Other sources of information about Bidens biternata:

Our websites:

Flora of Botswana: Bidens biternata
Flora of Malawi: Bidens biternata
Flora of Mozambique: Bidens biternata
Flora of Zambia: Bidens biternata

External websites:

Biodiversity Explorer (Biodiversity of southern Africa): Bidens biternata
EOL (Encyclopedia of Life): Bidens biternata
ePIC (electronic Plant Information Center): Bidens biternata
Flora Zambesiaca web site: Bidens biternata
Google: Web - Images - Scholar
GRIN (Germplasm Resources Information Network) taxonomy for plants report for Bidens biternata
IPNI (International Plant Names Index): Bidens biternata
Ispot Southern Africa : Bidens biternata
JSTOR Plant Science: Bidens biternata
Kew Herbarium catalogue: Bidens biternata
Tropicos: Bidens biternata
West African Plants database: Bidens biternata


Copyright: Mark Hyde, Bart Wursten, Petra Ballings and Meg Coates Palgrave, 2002-16

Hyde, M.A., Wursten, B.T., Ballings, P. & Coates Palgrave, M. (2016). Flora of Zimbabwe: Species information: Bidens biternata.
http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=160610, retrieved 1 October 2016

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