Beggarticks
''Bidens'' is a genus of flowering plants in the aster family (biology), family, Asteraceae.''Bidens''.
Flora of North America. The genus include roughly 230 species which are distributed worldwide.Knope, M. L., Funk, V. A., Johnson, M. A., Wagner, W. L., Datlof, E. M., Johnson, G., ... & Carlquist, S. (2020). Dispersal and adaptive radiation of ''Bidens'' (Compositae) across the remote archipelagoes of Polynesia. ''Journal of Systematics and Evolution'', ''58''(6), 805-822. Despite their global distribution, the systematics and taxonomy of the genus has been described as complicated and unorganized.Ganders, F. R., Berbee, M., & Perseyedi, M. (2000). ITS base sequence phylogeny in ''Bidens'' (Asteraceae): Evidence for the continental relatives of Hawaiian and Marquesan ...
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Bidens Pilosa
''Bidens pilosa'' is an annual species of herbaceous flowering plant in the daisy family Asteraceae. Its many common names include hitch hikers, black-jack, beggarticks, farmer’s friends and Spanish needle, but most commonly referred to as cobblers pegs. 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''.
Pacific Island Ecosystems at Risk (PIER). USFS.

Description

''Bidens pilosa'' is a branched annual of