About Spiranthes incurva (Jenn.) M.C.Pace
Spiranthes incurva, commonly called the Sphinx ladies' tresses, is a flowering plant species belonging to the orchid family Orchidaceae. It is native to the upper Midwest and Great Lakes Basin of North America. This species was first formally described as Ibidium incurvum Jenn. in 1906. For a long time, it was classified as part of a broad species concept of Spiranthes cernua. After a reevaluation of this species complex, Spiranthes incurva was reestablished as a distinct species in 2017. Spiranthes incurva is an ancient natural hybrid between S. cernua sensu stricto and S. magnicamporum.
