328 ORDER 137. ORCHID ACK.E. 



21 O. JJlicliauxii (N.) Very leafy; leaves elliptic-oval, the upper reduced; flowers 

 few, white ; petals 2-parted, the lower divisions linear-setaceous, like those of the 

 lip ; spur twice as long as the ovary ; flowers white. South. 



22 O. repens (N.) Stem very leafy from a creeping rhizome ; leaves all lance-linear, 

 long ; flowers greenish-yellow, dense in the spike, much smaller than in No. 21, but 

 otherwise similar. Pine-barrens, S. August, September. 



4. TIFULARIA, N. Sepals spatulate, spreading. Petals lance-liuear. 

 Lip sessile, 3-lobecl, middle lobe linear. Spur filiform, very long. Column 

 free. Anth. opening by a lid, with 4 pollen-masses, u Conns several, 

 connected by a thick fibre. Leaf 1. Flowers bractless. 



T. discolor N. Pine woods, Vt. to Ga. Leaf ovate, petiolate, 23'. Scape 1015' ; 

 raceme with many small, greenish, nodding flowers. July. 



5. BLETIA, R & P. Pet. and sep. subequal, distinct. Lip hooded 

 at end (spurless in our species). Column free. Pollinia 8, in pairs, waxy, 

 each pair pedicellate, if. Flowers racemed, showy. 



1 B. sipliy lla N. Leafless ; scape 1530', with few bracts ; racemes long and loose ; 



flowers purplish and yellowish-brown ; lip 3-lobed. Swamps, S. August. 



2 B. verecunda II. K. Leaves all radical, broad-lanceolate; scape 2 3f; flowers 



purple, large and showy ; lip broad and crisp at the end. Ga., Fla. July. 



6. CORALLORHIZA, Br. CORAL-ROOT. Sepals and petals subequal, 

 converging. Lip produced behind into a spur, which is adnate to the 

 ovary or obsolete. Pollinia 4. l Plants leafless, brown, arising from 

 coralline roots, sheathed with bracts. Flowers racemed. Fig. 240. 



* Spur conspicuously prominent, but adnate. Lip 3-lobed No. 1 



* Spur wholly obliterated. x Lip crenulate, wavy, not at all lobed No. 2 



x Lip entire, slightly toothed near the base Nos. 3, 4 



1 C. multiflora N. Scape 10 15', all brownish-purple, bearing 1520 fls. in a long 



rac. ; lip 3-lobed, white, spotted, 34" ; caps, elliptical, pendulous. Woods, M., N. JJ. 



2 C. odoiitorliiza N. Scape 914', all brownish-purple, bearing 1020 fls. in a long 



spike : lip undivided, oval, obtuse, spotted ? caps, roundish, reflexed. Old woods. JJ. 



3 C. I imata Br. Scape 5-10-flwd. ; lip oblong, angularly 2-toothed toward the baso, 



spotless, white ; caps, elliptic-obovoid. reflexed. Damp woods, N. : rare. 5 8'. Jn. 



4 C. Ulacriei Gr. Scape 15-20-flwd., fls. large ; lip oval, obtuse, obscurely auriculate 



at base ; caps, oval, 6", reflexed ; sepals and petals 0". N. II., N. and W. 10 1C'. 



7. APLECTRUM, N. ADAM-AND-EVE. PUTTY-ROOT. Sepals and 

 petals distinct, subequal, converging. Lip unguiculate, 3-lobed, middle lobe 

 crenulate. Spur 0. Column free, anth. a little below the apex, pollinia 4, 

 lens-shaped. 1C Root a globous corm. Leaf 1, large, biennial. Scape after 

 the leaf, bracted, racemed, and brown, as in Corallorhiza. Fig. 203. 



A., liycniale N. Woods: rare. Corm near 1' diam., a new one each year. Leaf ellip- 

 tic-ovate, 35', green all Winter. Scape 12--18', with a dozen brownish flowers. 



8. ONCIDIUM, Sw. Lip expanded, lobed, tubercled at base. Perianth 

 expanding. Sepals sometimes but 2. Column winged. Pollen masses 2, 

 each 2-lobed. n Splendid flowers, tropical, of easy culture in the green- 

 house. Flowers large, in open racemes, olive, yellow, &c. 



