Cypripedium parviflorum Salisbury var. parviflorum . Section: Cypripedium. Common name: Small Yellow Lady's-slipper. Phenology: Apr-Jun; Jul-Aug. Habitat: Mesic forests, seepy forests over amphibolite, other habitats. Distribution: 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, K4, NE, NS, NY, Pa, POWO, Va, Sheviak (1994), Wallace & Case (2000); = Cypripedium calceolus L. var. parviflorum (Salisb.) Fernald — Mo1, W, Luer (1975); = Cypripedium parviflorum Salisb. — S, S13, Tn, WV; < Cypripedium calceolus L. var. parviflorum (Salisb.) Fernald — C, F; < Cypripedium calceolus L. var. pubescens (Willd.) Knight — G, RAB, Correll (1950); < Cypripedium parviflorum Salisb. var. pubescens (Willd.) Knight — AqW; < Cypripedium pubescens Willd.

Links to other floras: = Cypripedium parviflorum var. parviflorum - FNA26

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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