Weed Science & Agronomy
INRA-Dijon
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Unité de Malherbologie & Agronomie Weed Science & Agronomy INRA-Dijon |
Bayer Code : bidfr
Synonym(s) of Sc. name: Bidens melanocarpa Wiegand
Classification: Compositae, Dicotyledonous
Common name: beggartricks (GB),devils beggartricks (U.S.A.)
Synonym(s) of Common name:
Name per country: DE : Schwarzfrüchtiger Zweizahn ; FR : bidens feuillu ; IT : forbicina peduncolata ; PT : erva-rapa ; EN : beggartricks (GB), EN : devils beggartricks (U.S.A.) ;
Biological type: Annual
- Cotyledons : oblong, glabrous, with conspicuous central vein, petiole and hypocotyl reddish.
- First two leaves opposite, lanceolate, dentate, with 2 lobes more conspicuous at base, pinnately veined, glabrous; tuft of white hairs at the intersection of the petiole on the stem.
- Height : 30-200 cm.
- Stem : erect, hispid, branched and often reddened above.
- Leaves : petiolate and opposite; the basal simple and lanceolate, the other divided into 3 lanceolate segments 7-10x1-3 cm the lateral, 9-12x2-4 cm the central, with dentate margin and sharp apex; the central segment on a lengthened petiole up to 1/2 as long as the blade.
- Inflorescence : capitula 2-4 cm in diam. with short, membranaceous non radiating scales ; disc-florets yellow.
- Fruit : achenes blackish with erect bristles on the edge and tilted on the two awns.
- Risk of confusion with: Bidens tripartita L., Bidens cernua L.
- Biological type : annual.
Mistake with: Bidens tripartita , Bidens cernua
Ecological profile (click on flags):
Present
Present
