ORCHIDACE^E. (ORCHIS FAMILY.) 341 



6. Goodyera. Like the last, but lip saccate, entire, without callosities and free from 



the column. Leaves all radical, white-reticulated. 



7. Idslera. Perianth spreading. Lip flat, 2-lobed. Stem low, with a pair of broad ses- 



sile leaves in the middle. 



8. Epipactis. Perianth spreading and ovary recurved. Lip somewhat jointed in the 



middle, concave and auriculate at base, dilated above. Stem leafy, stoat. 



Tribe IV. Perfect anthers 2, lateral, the sterile one forming a dilated fleshy appendage 

 above the terminal stigma ; pollen pulpy-granular. 



9. Cypripedium. Perianth spreading. Lip an inflated sac. Stems leafy, bearing one 



or a few showy flowers. 



1. CALYPSO, Salisb. 



Petals and sepals ascending, similar and nearly equal; lip with two shcrt 

 spurs below the apex. Column petaloid, oval and concave. Lower pair of 

 pollen-masses smaller, compressed. — A low herb, in bogs, with showy flowers, 

 a scaly-sheathed stem, and a single radical broad thin leaf. 



1. C. borealis, Salisb. Stem 3 to 6 inches high, with 2 or 3 membrana- 

 ceous brownish green sheaths, and a linear acuminate bract at the summit: 

 the radical leaf broadly ovate or slightly cordate : flower drooping : sepals 

 and petals lighc rose-color ; lip usually longer, brownish-pink mottled with pur- 

 ple, the edge margiued at the apex and bifid or entire, about equalling the 

 tooth-like spurs and with a tuft of yellow hairs at base. — From Colorado to 

 Oregon and British America ; thence eastward to the North Atlantic States. 



2. CORALLORHIZA, Haller. Coral-root. 



Petals and sepals ascending, similar and nearly equal, but the lateral sepals 

 oblique at base and either decurrent in a short spur adnate to the side of the 

 ovary, or forming a projecting gibbosity above it. Column narrowly mar- 

 gined, broader at base, somewhat incurved. — Without green herbage, .the 

 solitary scape with 2 to 4 membranaceous sheaths, and bearing a simple raceme 

 of brownish, yellowish, or purple flowers : pedicels reflexed in fruit. 



* Spur present: lip 3-lobed: flowers small, yellowish-green or ivhitish, often tinged 

 or mottled with purple. 



1. C. multiflora, Nutt. Scape a foot or two high, many-flowered : 

 sepals and petals 3-nerved ; spur manifest, but wholly adnate to the ovary; lip 

 nearly sessile, 3-lobed by a deep cleft on each side, the middle one rounded or 

 emarginate, with undulate or denticulate margin : capsule 6 to 9 fines long, 

 narrowed to a short rather stout pedicel. — Across the continent in north tem- 

 perate latitudes, and in. the Rocky Mountains southward to the Wasatch and 

 Colorado. 



2. C. irmata, R. Br. Scape slender, 4 to 10 inches high, 3 to 15-flowered : 

 sepals and petals l-nerced ; spur very short ; lip somewhat S-lobed by a lateral 

 cleft, abruptly attenuate to the base; column stout, constricted in the middle: 

 capsule 2 to 4 lines long, abruptly narrowed to a short very slender pedicel. — 

 From Colorado to Washington, and thence eastward to Canada and the 

 Atlantic States, and northward to the Arctic regions. 



