332 : THE ORCHID REVIEW. 
genus is exclusively tropical American, ranging along the Andes from 
Guatemala to Peru, with outlying species in Brazil and Guiana. 
Key to the Species. 
Petals elliptical or linear-oblong, obtuse. 
Petals elliptical . : 3 - 1. P. Schlimii, Rolfe. 
Petals liriear-oblong. ; 
Petals drooping, twisted; side lobes of lip without a pair of white 
tubercles 2. P. Lindleyanum, Rolfe. 
Petals more horizontal, less twisted ; side lobes of lip bearing a pair of 
white tubercles 3. P. Sargentianum, Rolfe. 
Petals tapering to a narrower apex. 
Petals under six inches long. 
Leaves an inch or more broad. 
Margins of petals nearly flat. 
Staminode cordate, acute. 4. P. vittatum, Rolfe. 
Staminode transversely oblong, obtuse 
5. P. longifolium, Rolfe. 
Margins of petals crisped-undulate. : 
Lower sepal a quarter to a third exceeding the lip 
6. P. Boissierianum, Rolfe. 
Lower sepal nearly twice as long as lip 
7. P. Czerwiakowianum, Rolfe. 
Leaves about 4 inch broad. 
Leaves with attenuate acute apex; ovary nearly glabrous 
8. P. caricinum, Rolfe. 
Leaves very little narrowed at apex ; ovary pubescent 
g. P. Klotzschianum, Rolfe. 
Petals a foot or more long . ‘ - 10. P. caudatum, Rolfe. 
: 6. CyPRIPEDIUM. 
This genus comprises all the Cypripediums with plicate leaves, and a 
persistent perianth, with valvate sepals. It differs from, Selenipedium in 
the one-celled ovary with parietal placentas, and the fusiform not 
crustaceous seeds. It is widely diffused in Europe, temperate Asia, and 
North America, about 30 species being known. 
: Key to the Species. 
Lip Saccate-globose. 
Flowers from the axil of a bract. 
Nerves .of leaves converging at the apex. 
Leaves three or more. 
Lateral sepals free 1. C. arietinum, R. Br. 
Lateral sepals united. 
