26 
The Ohio Naturalist. 
[Vol. X, No. 2, 
15. Lip not fringed nor eut-toothed, flowers greenish or whitish 16 
16. With one large and a much smaller leaf besides smaller bracts on the 
stem; beak of the stigma with 3 oblong or clavate appendages. 
Gymnandeniopsis 
16. With several large leaves on the stem 17 
17. Spur slender, straight, longer than the lip; lip hastate, with a tubercle 
at the base Perularia 
17. Spur much shorter than the lip, blunt, sac-like; lip 3-toothed at apex. 
Coeloglossum 
17. Spur seldom equalling the lip, blunt slightly incurved, decidedly 
clavate; lip lanceolate, entire Limnorchis 
Cypripedium L. 
Glandular pubescent herbs, with leafy stems or scapes, and 
thick tufted roots. Leaves large, broad, many-nerved. Flowers 
large, showy', solitary or several. Sepals spreading, separate, or 
two of them united. Lip a large inflated sac. Column declined, 
bearing a sessile or stalked anther on each side, and a dilated 
sterile stamen above, which covers the summit of the style. 
Pollen masses granular, without a caudicle or gland. Stigma 
terminal, broad, somewhat 3-lobed. 
1. Plant 2-leaved, scape 1-flowered, lip fissured in front C. acaule 
1. Stem leafy to the top, 1 -several flowered, lip not fissured in front, but 
with a rounded, open orifice 2 
2. Sepals and linear twisted petals acute, longer than the lip 3 
2. Sepals and petals not twisted, shorter than the lip or nearly' equalling it. 
C. reginae 
3. Lip white, sterile stamen lanceolate C. candidum 
3. Lip yellow, sterile stamen triangular C. parviflorum 
1. Cypripedium acaule Ait. Stemless Lady’s-slipper. Stem 16 
in. high, very pubescent; leaves 2, basal, 10-20 in. long, 4-8 
in. wide, sparsely pubescent; sepals greenish-purple; petals 
pink with darker veins, or sometimes white. A low plant 
with 2 large leaves and a showy', fragrant flower, growing in 
sandy or rocky woods. Medina, Portage, Hocking, Fairfield, 
Stark and Cuy'ahoga Counties. 
2. Cypripedium reginae Walt. Showy Lady’s-slipper. Stem 2 ft. 
high, very pubescent, leafy to the top; leaves elliptic, acute, 
5-7 in. long, 2-5 in. wide; flowers 1—3; lip much inflated, 
over 1 in. long, variegated with purple and white stripes. 
A tall leafy' plant with showy' flowers growing in swamps and 
woods. Fulton, Champaign, Lucas. Geauga, Portage, and 
Muskingum Counties. 
3. Cypripedium candidum Willd. Small White Lady'’s-slipper. 
Stem 4-12 in. high, slightly pubescent, leaf)'; leaves 3 or 4, 
elliptic or lanceolate, acute or acuminate, 3-5 in. long; 
bracts 1-2 in. long, lanceolate; flowers solitary'; lip white, 
striped with' purple inside, about 1 in. long. A small plant 
with showy' flower, growing in bogs and meadows. Wyandot 
and Erie Counties. 
