Helonias Linnaeus. Swamp Pink.
A monotypic genus, an herb of temperate e. North America. Although Helonias has traditionally been considered a monotypic genus, Takahashi & Kawano (1989) have suggested that the closely related Heloniopsis and Ypsilandra (both of e. Asia) may be congeneric.
Ref: Tamura In Kubitzki (1998a); Utech (2002d) In Flora of North America Editorial Committee (2002a); Zomlefer (1997a). Show full citations.