*Rheum Linnaeus. Subfamily: Polygonoideae. Tribe: Rumiceae. Rhubarb.
A genus of about 30-60 species, perennial herbs, of temperate and subtropical Asia and Europe.
Ref: Brandbyge (1993) In Kubitzki, Rohwer, & Bittrich (1993); Freeman (2005d) In Flora of North America Editorial Committee (2005). Show full citations.
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