''Bidens cernua'' is a species of flowering plant in the aster family,

Asteraceae The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae w ...

. ''Bidens cernua'' is distributed throughout much of

Eurasia Eurasia (, ) is the largest continental area on Earth, comprising all of Europe and Asia. Primarily in the Northern and Eastern Hemispheres, it spans from the British Isles and the Iberian Peninsula in the west to the Japanese archipelago a ...

and

North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...

.Flora of North America, ''Bidens cernua'' Linnaeus, Sp. Pl. 2: 832. 1753.
/ref>Flora of China, 柳叶鬼针草 liu ye gui zhen cao, ''Bidens cernua'' Linnaeus, Sp. Pl. 2: 832. 1753
/ref>Biota of North America Program 2014 county distribution map
/ref>Altervista Flora Italiana, Forbicina intera, ''Bidens cernua'' L.
includes photos and European distribution map It is commonly called nodding beggarticks or nodding bur-marigold.

Distribution and abundance

''Bidens cernua'' is distributed throughout much of

and

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.

References

{{Taxonbar, from=Q27501 cernua Flora of Asia Flora of North America Flora of Europe Plants described in 1753 Taxa named by Carl Linnaeus