Orthilia Rafinesque. Sidebells, One-sided Shinleaf, One-sided Wintergreen.
A monotypic genus, a subshrub, circumboreal in distribution. The recognition of Orthilia as separate from Pyrola is supported by molecular data (Freudenstein 1999a).
Ref: Freeman (2009e) In Flora of North America Editorial Committee (2009); Freudenstein (1999a); Stevens et al. In Kubitzki et al. (2004). Show full citations.