Bidens amplissima

Species in the Asteraceae family

Bidens amplissima, also known as the Vancouver Island beggarticks, is an annual wetland species in the family Asteraceae which displays a broad range of morphological variation and has a geographic range restricted to southwestern British Columbia and adjacent Washington State. Due to its limited global range and susceptibility to anthropogenic threats, B. amplissima is federally listed as Special Concern under Canada's Species at Risk Act and is blue-listed in British Columbia. Bidens amplissima shares a variety of morphological characteristics with two closely related species, B. cernua and B. tripartita, making identification challenging. Accurate identification also often depends on multiple morphological characters such as leaf shape, ray florets and achene shape.

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