Cypripedium parviflorum Salisbury var. parviflorum . Section: Cypripedium. Small Yellow Lady's-slipper. Phen: Apr-Jun; Jul-Aug. Hab: Mesic forests, seepy forests over amphibolite, other habitats. Dist: VT, NY, OH, IN, IL, MO and KS, south to NC, GA (?), AL (AL), AR, and OK.

Origin/Endemic status: Native

Taxonomy Comments: The exact range, abundance, and habitats of this variety in our area are obscure, because of confusion with the more northern var. makasin (Farwell) Sheviak and small-flowered forms of var. pubescens. See Sheviak (1994) for a discussion of why North American plants of yellow lady's-slippers are recognized as a species distinct from the European C. calceolus Linnaeus.

Synonymy: = Ar, FNA26, Il, K3, K4, NE, NY, Pa, Va, Sheviak (1994), Wallace & Case (2000); = Cypripedium calceolus var. parviflorum (Salisb.) Fernald – Mo1, W, Luer (1975); = Cypripedium parviflorum Salisb. – K1, S, S13, Tn, WV; < Cypripedium calceolus var. parviflorum (Salisb.) Fernald – C, F; < Cypripedium calceolus var. pubescens (Willd.) Knight – G, RAB, Correll (1950); < Cypripedium parviflorum Salisb. var. pubescens (Willd.) Knight – AqW; < Cypripedium pubescens Willd.

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Wetland Indicator Status:

• Eastern Mountains and Piedmont: FACW (name change)
• Great Plains: FACW (name change)
• Midwest: FACW (name change)
• Northcentral & Northeast: FAC (name change)

Heliophily ?: 3