Bidens cernua explained

Bidens cernua is a species of flowering plant in the aster family, Asteraceae. Bidens cernua is distributed throughout much of Eurasia and North America.^{[1] [2] [3] [4]} It is commonly called nodding beggarticks^[5] or nodding bur-marigold.

Distribution and abundance

Bidens cernua is distributed throughout much of Eurasia and North America.

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.

Notes and References

1. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=200023533 Flora of North America, Bidens cernua Linnaeus, Sp. Pl. 2: 832. 1753.
2. http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200023533 Flora of China, 柳叶鬼针草 liu ye gui zhen cao, Bidens cernua Linnaeus, Sp. Pl. 2: 832. 1753
3. http://bonap.net/MapGallery/County/Bidens%20cernua.png Biota of North America Program 2014 county distribution map
4. http://luirig.altervista.org/flora/taxa/index1.php?scientific-name=bidens+cernua Altervista Flora Italiana, Forbicina intera, Bidens cernua L.
5. Book: Voss, E.G. . Michigan Flora: A guide to the identification and occurrence of the native and naturalized seed-plants of the state. Part III: Dicots (Pyrolaceae–Compositae) . . 1996 . Bulletin 61 . Ann Arbor, Michigan, U.S.A..