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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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Hover over a shape, letter, icon, or arrow on the map for definition or see the legend. Data for arrows not developed for genera and families which may have species only occurring outside the flora area.

image of plant© Alan M. Cressler | Spiranthes cernua | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷

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