Spiranthes L.C. Richard. Ladies'-tresses, Pearl-twist, Spiral Orchid.

Key to Spiranthes

A genus of about 30-40 species, mainly north temperate, but with species scattered in other areas. The Spiranthes flora of our region is still rather poorly understood, with many novelties named and older deprecated taxa resurrected in recent decades, and the treatment here will undoubtedly change further, as proposed lumps and splits remain controversial.

Ref: Brown (2002); Dueck & Cameron (2007); Dueck & Cameron (2008); Hough & Young (2021); Luer (1975); Pace (2021); Pace & Cameron (2016); Pace & Cameron (2017); Pace et al. (2017); Pridgeon et al. (1999c); Sheviak (1991); Sheviak & Brown (2002) In Flora of North America Editorial Committee (2002a); Ward (2012a). Show full citations.

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