GENUS I. 



ORCHID FAMILY. 



549 



2. Cypripedium passerinum Richards. North- 

 ern Ladies'-slipper. Fig. 1355. 



Cypripedium passerinum Richards, App. Frank. Journ. 34. 

 1823. 



Stem villous-pubescent, leafy, 6'-io' high, bearing I 

 or 2 flowers at the top. Leaves oblong to elliptic-lanceo- 

 late, acute; sepals and petals shorter than the lip, the 

 upper sepal broad, nearly orbicular, yellowish ; lip nearly 

 spherical, magenta, deeper magenta within toward the 

 base. 



Woods and along streams, Ontario to Alberta and the 

 Yukon Territory. Summer. 



3. Cypripedium reginae Walt. Showy 

 Ladies'-slipper. Fig. 1356. 



?C. hirsututn Mill. Card. Diet. Ed. 8, no. 3. 1768. 

 Cypripedium reginae Walt. Fl. Car. 222. 1788. 

 Cypripedium album Ait. Hort. Kew. 3: 303. 1789. 

 Cypripedium spectabile Salisb. Trans. Linn. Soc. i : 

 78. 1791. 



Stern stout, villous-hirsute, i-2j high, leafy 

 to the top. Leaves elliptic, acute, 3' -7' long, i'-4' 

 wide, flowers 1-3 ; sepals round-ovate, white, not 

 longer than the lip, the lateral ones united for 

 their whole length ; petals somewhat narrower 

 than the sepals, white; lip much inflated, i'-2 r 

 long, white, variegated with crimson and white 

 stripes ; stamens cordate-ovate. 



In swamps and woods, Newfoundland to Ontario, 

 Minnesota and Georgia. Nerve-root. Ducks. Whip- 

 poor-will's-shoe. June-Sept. 



4. Cypripedium candidum Willd. Small 

 White Ladies'-slipper. Fig. 1357. 



Cypripedium candidum Willd. Sp. PI. 4: 142. 1805. 



Stem 6'-\2 high, leafy. Leaves 3 or 4, elliptic or 

 lanceolate, acute or acuminate, 3'-5' long, 8"-i6" 

 wide, with several obtuse sheathing scales below 

 them; bracts \'-z' long, lanceolate; flower solitary; 

 sepals lanceolate, equalling or longer than the lip, 

 greenish, purple spotted ; petals somewhat longer and 

 narrower than the sepals, wavy-twisted, greenish ; 

 lip white, striped with purple inside, about 10" long; 

 sterile stamen lanceolate. 



In bogs and meadows. New York and New Jersey to 

 Kentucky, Minnesota, Missouri and Nebraska. Ducks. 

 May-July. 



