534 CXL. ORCHIDACE^E. ORCHIS. 



11. O. ROTUNDIFOLIA. Pursh. (Habenaria. Rich. Platanthera. Lindl.} 

 Lf. solitary, roundish-ovate; scape naked; spike few-flowered; bracts ob- 



tuse, shorter than the ovary ; sep. and pet. obtuse ; lip 3-lobed, lateral, lobes sub- 

 falcate, middle one obcordate ; spur as long as the lip. Ct., Penn., Eaton, Can. 

 Scape about a foot high, slender, without a bract. Leaf 2 4' long, f as wide, 

 spotted, sheathing at base. Flowers about a dozen, of a greenish-white, remark- 

 able for their broad, 3 (almost 4)-lobed, pendant lip. 



* * Lip fimbriate. Stem leafy. 



12. O. CILIAEIS. (Habenaria. Rich. Platanthera. Lindl.} Yellow Fringed 

 Orchis. Lower Ivs. linear-lanceolate ; spike oblong, dense ; bracts shorter 



than the ovary ; lip oblong-lanceolate, pinnate-ciliate, twice as long as the petals ; 

 spur longer than the ovary. A delicately beautiful orchis, with bright orange- 

 colored flowers, in swamps, Can. to Ga. and Ky., rare. Stem about 2f high. 

 Leaves sheathing at. base ; lower ones 3 5' long, rapidly diminishing upwards. 

 Sepals roundish, obtuse, concave. 2 petals linear, very small, incised at the 

 summit ; the lip narrow, lanceolate, conspicuously fringed, 4" long. Spur 1' 

 in length. July, Aug. 



13. O. CRISTATA. Michx. (Habenaria. Brown. Platanthera. Lindl.) 

 Lvs. lanceolate and lance-linear; spike somewhat crowded, many-flow- 



ered ; segments of the perianth rounded, the two lateral petals toothed, lip oblong, 

 pinnately ciliate, spur shorter than the ovary. Swamps, N. J., Penn. to Car. 

 A small species, distinguished from the foregoing by smaller and more crowded 

 flowers which are of a bright orange-yellow, and by its shorter spur, &c. Jn. Jl. 



14. O. BLEPHARIGLOTTIS. Willd. (Habenaria. Rich. Platanthera. Lindl.) 

 White Fringed Orchis. Lower Ivs. lanceolate, channeled; spike oblong, 



dense ; bracts linear, acuminate, shorter than the flowers ; lip lanceolate, 

 ciliate, as long as the upper sepal ; spur much longer than the long-beaked 

 ovary. A delicate orchis, in swamps, (N. Y. ! to Car.,) resembling the 

 last species, but distinguished at least, by the color of its flowers which are of 

 a pure white. Stem 1 2f high. Flowers fewer than in the last. Sepals round- 

 ish-oblong, lateral reflexed. Petals spatulate, dentate. Lip fringed in the mid- 

 dle, 2 X/ long. June, July. 



15. O. FISSA. Willd. (Habenaria. 



St. tall, leafy ; Ivs. lanceolate and lance-linear ; bracts nearly equaling the 

 ovary ; sep. roundish-ovate ; lateral petals denticulate ; lip ^parted, divisions 

 cuneiform, dentate, middle one 2-lobed ; spur filiform, clavare at end, curved. 

 Jonger than the ovary. Wet grounds and marshes, Penn. to Va., W. to Ind. ! 

 A truly beautiful species 2 4f high. Stem slightly winged. Leaves 4 & 

 long. Flowers violet-purple, large, 20 50, in a terminal spike. Ovary I 7 , and 

 spur li' long. June, July. 



16'. O. LACERA. Michx. (O. -Psycodes. Spr. Habenaria. Ur. Platan- 



thera. Lindl.) Ragged Orchis. Lower Ivs. oblong, obtuse, upper ones 

 narrow, acuminate ; bracts longer than the flowers ; sep. retuse ; pet. emargi- 

 nate; Up 3-parted, segments cuneate, capillaceous-multifid ; spur filiform, cla- 

 vate, as long as the oVary. Swamps and meadows, Can. to Car. Stem 1 2f 

 high, smooth, slender. Leaves few, 3 6' by \ 1', mostly acute. Flowers 

 numerous, in a long, loose spike, of a greenish- white, not showy. Sepals ovate. 

 Petals oblong-linear, entire, lip reflexed, very deeply laciniate. Readily dis- 

 tinguished from the following by its more slender habit, greenish flowers, and 

 the entire (not fringed) petals. July. 



17. O. PYSCODES. (O. fimbriata. Br. Habenaria. Rich. Platanthera. 



Lindl.} Purple Fringed Orchis. Lower Ivs. lanceolate, diminishing up- 

 wards ; Up. 3-parted, scarcely longer than the petals, the segments cuneiform, 

 ciliate-fimbriate ; lateral pet. ovate, fimbriate-dentate ; spur filiform, clavate, 

 longer than the ovary. A beautiful plant, common in meadows, Can., N. Eng., 

 Mid. and W. States. Stem 1 2$f high, smooth, slender. Leaves 3 6' long. 

 Flowers showy, numerous, in a terminal, cylindric spike, light purple. Lip of 

 the nectary somewhat longer than the petals, its 3, fan-like, spreading segments, 

 as well as the petals, beautifully fringed. Spur an inch in length. July. 



