*Cynoglossum Linnaeus. Comfrey.
Key to Cynoglossum
A genus of about 75 species, herbs, of the temperate Old World (but circumscription uncertain).
Ref: Al-Shehbaz (1991); Hilger, Greuter, & Stier (2015); Selvi & Sutorý (2012); Weigend et al. (2013); Weigend et al. (2016) In Kadereit & Bittrich (2016). Show full citations.
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