Cypripedium acaule


Hort. Kew. 3: 303. 1789

Common names: Small pink lady’s-slipper pink moccasin-flower stemless lady’s-slipper cypripède acaule
Synonyms: Fissipes acaulis (Aiton) Small
Treatment appears in FNA Volume 26. Treatment on page 502. Mentioned on page 499.
Plants erect, 15–61 cm; stems leafless scapes. Leaves 2, radical, arising directly from rhizome, ascending to spreading; blade broadly elliptic to oblong-, ovate-, or obovate-elliptic, 9–30 × 2.5–15 cm. Flowers solitary; sepals reddish brown to green; dorsal sepal lanceolate to lance-ovate or elliptic, 19–52 × 5–22 mm; lateral sepals connate, synsepal 17–49 × 6–25 mm; petals deflexed to somewhat spreading, somewhat spirally twisted, same color as sepals, linear- to ovate-lanceolate, 24–60 × 4–17 mm; lip magenta to white, obovoid to oblance-ovoid, 30–67 mm, orifice a longitudinal fissure, length of lip; staminode quadrangular to suborbicular-rhomboid or ovoid-deltoid. 2n = 20.

Phenology: Flowering Apr–Jul.
Habitat: Dry to wet forests, bogs, brushy barrens, heath, and roadsides on highly acidic soil
Elevation: mostly 0–1200 m


V26 1023-distribution-map.jpg

Alta., Man., N.B., Nfld. and Labr. (Nfld.), N.W.T., N.S., Ont., P.E.I., Que., Sask., Ala., Conn., Del., D.C., Ga., Ill., Ind., Ky., Maine, Md., Mass., Mich., Minn., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., S.C., Tenn., Vt., Va., W.Va., Wis.




Lower Taxa

No lower taxa listed.