(n) any of several chiefly American wildflowers having an inflated pouchlike lip; difficult or impossible to cultivate in the garden, Syn. lady-slipper, ladies' slipper, slipper orchid
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
pos>n. (Bot.) Any orchidaceous plant of the genus Cypripedium, the labellum of which resembles a slipper. Less commonly, in the United States, the garden balsam (Impatiens Balsamina). [ 1913 Webster ]