44 ANGIOSPERM^. 



celled. 10 species; formerly Included in 2, Cypripedium, Ventts' 

 Slippek. Very numerous species, cosmopolitan, in all climates; 

 usually yellow, sometimes white or pinli or purple ; one, C. guttdtum 

 (Eussia), blood-stained. C. Calceolus (Calc6olus Maridnus), Our 

 Lady's Slipper; yellow, large. Gt. Brit. C. pubescens, Moccasin 

 Plowek ; large, yellow, sol. Can. to Wis., S. to Ga. C. cdndidum, 

 large, white, sol. Penn., N. and W. C. speetdbile, stem 2° high, 

 with 2-3 large fls., labellum white, purple-striped. Swamps, Can. to 

 Ky. 3. Uropedium Lindeni, labellum flat, petals long-tailed. New 

 Granada, 8500° above the sea. 



Tribe 2. Neottiex. — 1. Spir4nthes, Lady's Traces ; fibrous rts., 

 like corset-laces. 50 species. Lvs. grass-like ; fls. in a spirally-twisted 

 spike. Et. tuberous in some species. Sev. spec, in Can. and U. S. 

 8, Goodyera repens, G. pubescens, Rattlesnake Plantain. Lvs. 

 ovate, mottled with white; fls. white or greenish. Can. to Car. ; Gt. 

 Brit. 3. Listera. Stem 2-leaved, with a raceme of small green fls. 

 Pew species. Bur., N. Asia, N. Am. 4. Ne6ttia, like Listera, but 

 leafless. 4 species : 3 in N. Asia; 1 Gt. Brit. : N. Nidus-avis, Bird's- 

 Nest Orchis. 



Tribe 3. VaniUeae.— 1. Vanilla. Climbing. Lvs. oblong-cordate, 

 succulent, fls. thick, fleshy, dull-colored ; capsule linear, fleshy ; the 

 Vanilla-pod of commerce. Sev, spec. Mex., W. Ind., trop. Asia. 

 2. Cyrtosia Lindleydna ; similar, but leafless, with flat capsule; fls. 

 bright yellow. Sikkim. 3. Erythrbrchis, stems dull red, leafless, 

 climbing to a great height. Burmah and adjacent islands. K. sc&n^ 

 dens, stems 50°-100° long, with racemes of yellow fls., the lip tinged 

 with pale blue. 



Tribe 4. Arethvisese. 1. Arethiisa bulbbsa, only species. Scape 

 e'-IO' high, from a bulb ; terminated by a sol. bright pink flower 2' 

 long, with bearded lip. Bogs, Can. to Va., W. to Wis. 2. Pog6nia. 

 Similar to Arethusa, Dut fls. often racemose and of various colors. 20 

 species. Am., Asia. 4 species in U. S. P. ophioglossoldes, fl. large, 

 sol., nodding, purple. Can., N. Eng., to Car., Ky. P. divaricdta, 

 stem 2° high, 2-leaved ; fl. large, sol. ; petals pink, sepals purple, lip 

 green, with purple veins. Swamps, Va. to Fla. and La. 3. Calo- 

 p6gon, lip as in last. 4 species, all small, lvs. grass-like. C. pul- 

 chHlus, scape 1° high, with 2-6 pink-purple fts. V broad at top. 

 Bogs, IT. S. and Can. 



Tribe S. Ophrydeae. — 1. Habenaria. Many species, most numer- 

 ous in Ind., Af. ; found in Eur. ; more numerous in Am. Pis. spurred ; 

 green, rose, yellow ; more frequently white, fragrant ; lip often fringed ; 

 ovary usually twisted. H. ehlordntha, fls. white, long-spurred, fra- 

 grant, in a spike. Gt. Brit. 20 species in IT. S., all in bogs or low 

 grounds. H. fimbriata, Pringbd Orchis ; Penn , N. E. ; H. psy- 

 chodes, smaller; both fringed, purple, spiked. H. Bigelbvii, larger, 

 purple, racemed. Can. to Penn. H. cilidris, fls. yellow, fringed, 

 spicate. Can., IT. S. H. nlvea, fls. white, spicate, not fringed ; ovary 

 not twisted. Del., S. H. viridis, fls. green, not fringed. N. H-. 

 orbiculdta, lvs. orbicular, scape l°-2° high, with a raceme of large, 

 greenish-white fls. N. 2. Orchis. Many species, Eur., temperate 

 Asia, few in N. Am. Pis. spurred. O. mdscula, Male O. ; tuberous, 

 with showy pink or flesh-colored fls. in a loose spike, Gt. Brit. O. 

 Mbrio, tubers (as also those of O. mdscula) made into Salep; Pig, 



