Spiranthes arcisepala M.C. Pace. Dist: NB and QC south to NC, mainly in the Appalachians, and west to s. MI and n. IN.

Origin/Endemic status: Native

Synonymy: = K4, Hough & Young (2021), Pace & Cameron (2017); < Ibidium cernuum (L.) House – S; < Spiranthes cernua (L.) Rich. – FNA26, G, K1, K3, NE, Pa, Tn, Va, W, WV; < Spiranthes cernua (L.) Rich. var. cernua – C, GW1, RAB, Luer (1975)

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