This is an accepted version of this page Bidens hyperborea (common names estuary beggarticks,[5] northern beggarticks,[6] or estuary bur-marigold[7]) is a variable species of flowering plant in the family Asteraceae, known from estuarine regions in northeastern North America.

[1] Bidens hyperborea is an annual herb, growing up to 70 cm (28 inches) tall.

[11] In 1915, Meritt Lyndon Fernald and Harold St. John described Bidens colpophila from specimens collected near the mouth of the Kennebec River, noting its similarities to Greene's B. hyperborea but distinguishing it based on characteristics of the achenes.

[12] A subsequent 1918 review by Fernald concluded that B. hyperborea and B. colpophila were conspecific, but the variability of the species in numerous isolated localities led to the circumscription of a number of varieties, distinguished by the length of the achenes, leaf morphology, and growth habit.

[2] It grows along the coasts of Hudson Bay, the Arctic Ocean, and the North Atlantic Ocean in eastern Canada (Labrador,[13] Nunavut, Ontario, Quebec, New Brunswick, Nova Scotia) and the northeastern United States (Maine, New Hampshire, Massachusetts, New York).