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Bidens hyperborea
Also called Coastal Beggarticks, Northern Estuarine Beggarticks
Estuary beggarticks is a variable annual herb of northeastern North American salt marshes and tidal estuaries, with yellow daisy-like flower heads. It is a wild, rare species rather than a garden plant, and it needs moist, tidal conditions to grow.
Bidens hyperborea is a species of flowering plant in the family Asteraceae commonly known as estuary beggarticks, northern beggarticks, or estuary bur-marigold. Known from marshes and estuarine regions in northeastern North America, it is a variable annual herb with yellow flowers similar to Bidens cernua, Bidens laevis, and Bidens eatonii. B. hyperborea is listed as an endangered species in the state of Massachusetts, where it is threatened by habitat degradation, and is listed by NatureServe as critically imperiled (S1) in the province of Ontario and possibly extirpated from New Hampshire.
Bidens hyperborea is native to northeastern North America. It is found in Canada (Ontario, Quebec, New Brunswick, and Nova Scotia) and the United States (Maine, New Hampshire, and Massachusetts). Fassett proposed that its wide but disjunct and ecologically narrow distribution emerged towards the end of the Last Glacial Period, when freshwater released from the melting ice sheet of eastern North America entered the ocean and produced vast estuarine areas, which slowly retreated and became more saline as the flow diminished, stranding the plants in the remaining suitable habitats.
Eaton's beggarticks · Devil's beggartick · Connecticut beggarticks · Bidens nudata · Hairy beggarticks · Manzanilla trepador · Big devils beggartick
Text excerpted from the Wikipedia article Bidens hyperborea by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
