| cypripedium | (n) genus of chiefly American perennial leafy-stemmed orchids: lady's slippers; sometimes includes species of genus Paphiopedilum, Syn. genus Cypripedium |
| california lady's slipper | (n) often having many yellow-green orchids with white pouches growing along streams and seeps of southwestern Oregon and northern California, Syn. Cypripedium californicum |
| clustered lady's slipper | (n) clusters of several short stems each having 2 broad leaves and 2-4 drooping brownish to greenish flowers with pouches mottled with purple; British Columbia to central California and northern Colorado, Syn. Cypripedium fasciculatum |
| common lady's-slipper | (n) pale pink wild orchid of northeastern America having an inflated pouchlike lip, Syn. showy lady's-slipper, showy lady slipper, Cypripedium reginae, Cypripedium album |
| large yellow lady's slipper | (n) plant of eastern and central North America having slightly fragrant purple-marked greenish-yellow flowers, Syn. Cypripedium calceolus pubescens |
| moccasin flower | (n) once common rose pink woodland orchid of eastern North America, Syn. Cypripedium acaule, nerveroot |
| mountain lady's slipper | (n) leafy plant having a few stems in a clump with 1 white and dull purple flower in each upper leaf axil; Alaska to northern California and Wyoming, Syn. Cypripedium montanum |
| ram's-head | (n) orchid of northern North America having a brownish-green flower and red-and-white lip suggestive of a ram's head, Syn. ram's-head lady's slipper, Cypripedium arietinum |
| yellow lady's slipper | (n) maroon to purple-brown orchid with yellow lip; Europe, North America and Japan, Syn. yellow lady-slipper, Cypripedium parviflorum, Cypripedium calceolus |