A genus of about 7 species, perennial herbs, of disjunct areas in the Northern Hemisphere. Sometimes included in Geum. Protopopova, Pavlichenko, and Stepanov (2021) supported its treatment as a genus separate from Geum.
Ref: Eriksson et al. (2003); Kalkman In Kubitzki et al. (2004); Phipps (2014b) In Flora of North America Editorial Committee (2014); Potter et al. (2007); Protopopova, Pavlichenko, and Stepanov (2021); Smedmark (2006); Smedmark & Eriksson (2002); Weakley & Gandhi (2008). Show full citations.