Platanthera grandiflora, the greater purple fringed orchid, is a species of orchid, genus Platanthera, occurring from Ontario to Newfoundland, south along the Appalachian Mountains to northeastern Georgia, with an isolated population in Illinois.Flora of North America v 26 p 565, Platanthera grandifloraBiota of North America Program, county distribution map It is imperiled in Georgia, Tennessee, Virginia and North Carolina and presumed extirpated in Ohio.
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