Bidens cernua

Bidens cernua is a species of flowering plant in the aster family, Asteraceae.^[4][5][6][7] Bidens cernua is distributed throughout much of Eurasia and North America.^[4][5][6][7] It is commonly called nodding beggarticks^[8] or nodding bur-marigold.^[9]

Bidens cernua
Conservation status
Secure  (NatureServe)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
Genus:	Bidens
Species:	B. cernua
Binomial name
Bidens cernua L.
Synonyms[1][2][3]
Bidens ciliolata Greene Bidens cusickii Greene Bidens dentata (Nutt.) Wiegand Bidens elliptica (Wiegand) Gleason Bidens filamentosa Rydb. Bidens gracilenta Greene Bidens graveolens Komarov 1916 not Mart. 1824 Bidens kelloggii Greene Bidens leptomeria Greene Bidens leptopoda Greene Bidens lonchophylla Greene Bidens macounii Greene Bidens marginata Greene 1901 not Perr ex DC. 1836 Bidens minima Huds. Bidens prionophylla Greene Bidens quadriaristata var. dentata Nutt. Bidens tripartita var. minima Huds. Bidens venosa Gardner Buphthalmum nutans Vitman Coreopsis bidens L. Coreopsis quadricornis Krock. Coreopsis ridens Gunnerus

Distribution and abundance

Bidens cernua is distributed throughout much of Eurasia and North America.^[4][5][6][7]

Morphology

General description

Bidens cernua is an annual species growing roughly 1m tall, with a fibrous root. Stems are rigid and often either simple or beached. Stem leaves are simple, unstalked, and opposite.