Cypripedium acaule Aiton

Moccasin Flower, Pink Lady's Slipper Orchid

Family: Orchidaceae

Genus: Cypripedium

Category: Perennial

Zones: 2 to 8

Size: From 6 to 24" tall

Exposure: Part Shade


Pink to purple flowers with dark veins. They have a pouch which looks like a partially inflated balloon. Two leaves from the rhizome, to 10" long, 6" wide. One flower per stem in spring to summer. Acid soil.


Native to Eastern USA (not Florida) and Canada.

Introduced in 1786 by William Hamilton to the UK.

Published in Hortus Kew. 3: 303 in 1789.

Catesby's Natural History Appendix Plate 3 includes a drawing and description.

Also depicted (crudely) in Volume II plate 72.


Sources of Information

© 2010-12 Lisa J. Miner