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Coptis Salisbury. Subfamily: Coptidoideae. Goldthread.

A genus of about 15 species, perennial herbs, of boreal to temperate e. Asia and North America. If Glaucidium (of e. Asia) and Hydrastis are excluded (as here) from Ranunculaceae, Coptis is the "basalmost" genus in the family, treated as a monogeneric subfamily Coptidoideae and tribe Coptideae.

Ref: Ford (1997f) In Flora of North America Editorial Committee (1997); Tamura In Kubitzki, Rohwer, & Bittrich (1993); Xiang et al. (2016); Zhai et al. (2019). Show full citations.

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