

 Corallorhiza. ORCHID ACE^E. 131 



TRIBE IV. CYPRIPEDIEJ1. Perfect anthers 2, lateral, the sterile one forming a dilated 

 fleshy appendage above the terminal stigma. Pollen pulpy-granular. 



10. Cypripedium. Perianth spreading. Lip an inflated sac. Stems leafy, the few flowers 

 showy. 



1. CALYPSO, Salisbury. CALYPSO. 



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

 short spurs below the apex. Column erect, broadly winged and petaloid, oval and 

 concave, bearing the hemispherical anther on the summit. Pollen-masses in two 

 pairs, the lower smaller, compressed, sessile upon a nearly square membranaceous 

 gland. A low herb, in bogs, the 1-flowered scaly-sheathed stem from a small 

 solid bulb, and with a single radical broad thin leaf. Flowers showy. 



A single species, very rare in Northern Europe and Siberia, rather more common in America. 



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

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

 radical leaf broadly ovate or slightly cordate, an inch or two long, petioled : flower 

 pedicelled, drooping: sepals and petals lanceolate, acuminate, light rose-color, 6 to 

 9 lines long ; lip usually slightly longer, ovate-inflated, brownish-pink mottled with 

 purple, the edge margined at the apex and bih'd or entire, about equalling the tooth- 

 like spurs and with a tuft of yellow hairs at base : column half the length of the 

 petals : capsule oblong-cylindric, an inch long, about equalling the slender pedicel. 

 Parad. Lond. t. 89; Hook. Exot. Fl. t. 12, & Bot. Mag. t. 2763. C. Americana, 

 E. Brown in Ait. f. Hort. Kew. v. 208. 



In the mountains of Mendocino County, very rare (Afiller, Vasey) ; more common in Oregon 

 and Colorado, thence through P>ritish America and along the northern border of the Atlantic 



States. 



2. CORALLORHIZA, Haller. CORAL-ROOT. 



Flowers ascending. Petals and sepals ascending, the upper somewhat incurved, 

 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 ; lip dilated and more or less recurved, flat or concave, with a pair of 

 somewhat prominent longitudinal ridges near the base. Column semiterete and 

 narrowly margined, broader at base, somewhat incurved, bearing the caducous 

 anther on the summit. Pollen-masses in two pairs, distinct, sessile upon a short 

 oblong gland. Without green herbage and probably parasitical, the solitary 

 scapes with 2 to 4 membranaceous sheaths, and bearing a simple raceme of brown- 

 ish, yellowish or purple flowers : rootstocks much branched and coral-like : pedicels 

 reflexed in fruit. 



Of the following species one only is also found in Europe and Siberia. There is besides a 

 species peculiar to the Atlantic States, two others are described from Mexico, and a third from 

 Central Asia. 



* Spur present (sometimes obscure) : flowers small, yellowish-green or whitish, 

 often tinged or mottled with purple. 



t Spur more or less prominent : sepals and petals 3-nerved: capsule oblong- 

 cylindric. 



1. C. multiflora, I^utt. Scape a foot or two high, many-flowered : sepals and 

 petals 3 or 4 lines long ; spur manifest, but wholly adnate to the ovary, a line long 

 or more ; lip broadly ovate and nearly sessile, somewhat convex and the ridges 



