Spiranthes sheviakii M. Hough & M.A. Young. Old Field Ladies'-tresses. Hab: Acidic, dry-mesic successional habitats, old fields, barrens, thickets, dry-open woodland bluffs, ravine-rims. Dist: C. NY and s. ON west to sw. MI and ne. IL, south to n. AK, east to KY/TN and s. OH.

ID notes: Spiranthes sheviakii differs from S. cernua in having a centrally yellowed lip (vs. white) and spherical (vs. conical/flattened) abaxial glands. It can be distinguished from S. ×kapnosperia and S. ochroleuca by its straight lateral sepals that frequently curve inward apically (vs. straight to somewhat falcate and not curved apically).

Origin/Endemic status: Native

Taxonomy Comments: See Hough & Young (2021) for detailed discussion.

Synonymy: = Hough & Young (2021); < Spiranthes cernua (L.) Rich. – FNA26, Il, Pa; < Spiranthes cernua (L.) Rich. var. cernua – C, F

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