Bidens bipinnata

Its native range remains uncertain due to its global distribution, however prevailing thought places its origin in Asia and North America. It is most commonly called by the common name Spanish needles. ==Description==

Bidens bipinnata is an annual herb up to 150 cm (60 inches) tall. It produces white or yellow flower heads each containing both disc florets and ray florets. The species grows in fields, forests, and disturbed sites such as road embankments and fallow agricultural areas. Habitat B. pinnata tends to be a weedy, ruderal species. It prefers moist, sandy soils and shaded environments. ==Uses==

B. pinnata can be used as a potherb. ==Gallery==

File:B.bipinnata-aerial-1.jpg|A yellow B. bipinnata flower blooming in mid-October in Texas. File:B.bipinnata-double-seedhead.jpg|Needle-like seeds, hence the name "Spanish Needle". Each bearing three to four barbed spikes to facilitate propagation. ==See also==