bidens pilosa

Bidens pilosa is an annual species of herbaceous flowering plant in the daisy family Asteraceae. Its many common names include black-jack, beggarticks, cobbler's pegs and Spanish needle, but most commonly referred to as farmers' friends. It is native to the Americas but is widely distributed as an introduced species in other regions worldwide including Eurasia, Africa, Australia, South America and the Pacific Islands.

Bidens pilosa is a branched annual forb of gracile habit, growing up to 1.8 meters ...