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... more about "Coptis trifolia"
Bruce A. Ford +
(Linnaeus) Salisbury +
Helleborus trifolius +
Goldthread +, goldenroot +, yellow snakeroot +, savoyana +  and coptide trifoliolée +
Greenland +, St. Pierre and Miquelon +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. +, N.W.T. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Alaska +, Conn. +, Ind. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, N.H. +, N.J. +, N.Y. +, Ohio +, Pa. +, R.I. +, Vt. +, W.Va. +, Wis. +  and e Eurasia. +
0-1500m +
Wet to mesic, coniferous and mixed forests, bogs, willow scrub, and tundra, often associated with mosses +
Flowering late spring–summer (May–Aug). +
Trans. Linn. Soc. London +
Illustrated +  and Weedy +
Coptis groenlandica +  and Coptis trifolia subsp. groenlandica +
Coptis trifolia +
species +