Corallorhiza. ORCniDACEJ^. 131 



TuiBK IV. CYPRirEDIE/E. Perfect antlieis '2, Literal, the sterile one forming a dilated 

 ilcshy n]ij)on(liigc above tlie terminal slignm. Pollen pnlpy-grannlar. 



10. Cypripedium. Perinnth sjircading. Lip an inllated sac. Stems leafy, the few flowers 

 showy. 



1. CALYPSO, Salisbnry. Calypso. 



Petals aiul sopals ascendiuf,', 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, coni])ressed, sessile upon a nearly sijuare membranaceous 



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



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



A single spe(;ies, very rare in Northern Europe and Siberia, rather more common in America. 



1. C. borealis, Salisb. Stem 3 to G 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 

 ])C(licelled, drooping: sejKils and petals lanceolate, acuminate, light rose-color, 6 to 

 9 lin(>s long; liji usually slightly longer, ovate-inllated, brownish-pink mottled with 

 ])urple, the edge margined at the ape.x. and bilid or entire, about e(pialling the tooth- 

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

 ])etals : capsule oblong-cylindric, an inch long, about equalling the slender pedicel. — 

 Parad. Lond. t. 89; Hook. Exot. Fl. t. 12, & Pot. Mag. t. 27G3. C. Americana, 

 P. Prown in Ait. f. Hort. Kew. v. 208. 



In the mountains of Mendocino Comity, very rare {Miller, Vnscy) ; more common in Oregon 

 and Colorado, thence through Pritish America and along the northern border of the Atlantic 

 States. 



2. CORALLORHIZA, Haller. ConAL-Roor. 



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, <listinct, sessile upon a short 

 oblong gland. — Without green lierbage 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 branclied and coral-like : pedicels 

 redexcd in fruit. 



Of the following species one only is also fouiul in Europe and Siberia. There is In'sides a 

 species jieculiar to the Atlantic States, two others are described from Jlcxico, and a third from 

 Central Asia. 



* Sjmr 2>resent (sometimes ohsciire) : flowers small, i/rl/nwi^h-rjreen or ichitish, 



often tinged or mottled ivith 2)}irj}le. 

 ■i- Spur more or less prominent: sepals and petals 3-iicrved: capsule ohlong- 



ojVnulric. 

 1. C. multiflora, Nutt. Scajie a foot or two high, jnany-flowered : sepals and 

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

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



