Orchis. CXL. ORCHIDACEiE. 533 



bracts linear-lanceolate, acute, longer than the flower; scp. deflexed; pet. Rnd lip 

 linear, obtuse, subequal, (the latter dilated at base!) and about as lon^ as the 

 pendulous, obtuse spur. — A tall, iealy, variable .species, found in mountainous 

 woods and open meadows, N. Y. to Mich, and Can. Stems thick, 2 or 3, or 

 even 4 leet high. Leaves lanceolate, 4—7' by 1 — IJ'. Flowers greenish in 

 shades, nearly white in open situations, lorming a long, more or less dense 

 spike. July. 



/?. Huronrrisis. More slender; Ivs. lance-oblong and lance-linear, obtu.se or 

 acute; spike rather loo.se, ollen kmg. — Vt., Dr. Phelps! W. to Mich. 



5. O. nir.ATATA. Pursh. (Ilabenaria. Hwk. Platanth. LiiuJl.) 



5'/. slender; Ivs. lanceolate and linear, acute ; spike loo.se; brticis lance- 

 linear, about as long as the flowers; upper sepal ovate, obtu.se, the lateral nar- 

 rower and spreading; lip linear, entire, obtuse, dilated at the ba.se, about equal- 

 ing the petals and a little shorter than the obtuse, incurved spur, which is longer 

 than the ovary. — Swamps, Northern States ! (rare) and Can. It is a slender 

 and delicate species, with pure white flowers. Stem 10 — 15' high. Leaves 

 often narrow and gras.s-like, the lower lanceolate. Flowers 10 — 20, spur about 

 4" long. July. 



6. O. OBTUSATA. Pursh. (Platanthera. Lindl. Habenaria. Rich.) 



Lf. solitary, oblong-obovate, obtuse j .s^. bearing the leaf near its base ; 

 spike loose; upper scp. broadest; pet. subtriangular; //;; linear, entire, with 2 

 tubercles at base, as long as the arcuate, acute spur. — Found in muddy ponds 

 and ditches, N. H., SUrrrsl N. to Lab. Stem slender, angular, 6 — 8' high, ter- 

 minating in a thin spike of about a dozen .small, greenish-white flowers. Leaf 

 tapering at base, and usually obtuse at the summit, 2 — 3' in length, and 1 in 

 breadth, issuing with the stem from 2 — 3 radical, .sheathing bracts. July. 



7. O. INTEGRA. Nutt. (Habenaria. Sprcn^.') 



St. leafy; Ivs. lanceolate and lance-linear; bracts shorter than the flowers; 

 lip oblong, entire, longer than the petals ; spur subulate, longer than the ovary. 

 — Swamps, N. J., Nuttall. A species very nearly allied to O. ciliaris, appa- 

 rently diflfering only in the flowers being smaller; and with the lip entire, not 

 fringed. Flowers orange-yellow. Jl. 



^3. Habenaria. Lip dilated., variously divided, Gla?ids of the pedi- 

 cels of the pollinia imked^ distinct. 

 * Lip toothed or 3-partcd, not fimbriate. 



8. O. FLAVA. (Habenaria herbiola. Br. Platanthera. Lindl.) 



St. leafy; loiccr Ivs. oblong, acute, upper lanceolate, acuminate; spike 

 rather dense, cylindric; Z'/v7/-/s longer than the flowers; Z/p oblong, obtuse, den- 

 tate at base ; paJatc with 1 tuberculate tooth; spnr filiform, rather shorter than 

 the sessile ovary. — A small-flowered orchis found in alluvial soil. Stem flexu- 

 ous, 12 — 18' high. Leaves about 3, with long sheaths, 3 — 6 or 1' by | — 2', taper- 

 ing to an acute summit. Flowers in a long, thin spike. Sepals short, ovate, 

 green. Petals yellowish. Upper bracts about as long as the flowers, lower ones 

 2 or 3 times as long. The tubercle of the lip is a remarkable character. June. 



9. O. vjRiDis. Swtz. (O. bracteata. Mw/i/. Peristylusbracteatus. Z/?/tr//.) 

 St. leafy ; Ivs. oblong, obtuse, upper ones acute ; spike lax ; bracts 2 — 3 



times as long as the flowers; sep. connivent, ovate ; pet. linear, erect; Z//>linear- 

 cuneate, truncate, 3-toothed at the end, the middle tooth small or ob.solete ; spur 

 short, inflated, obtuse. — A small, green-flowered orchis, in shades. Stem G — 9' 

 high. Leaves about 3, 18 — 30" by 6 — 12'', upper bracts as short as the flower. 

 Spikes 2 — 3' long. Flowers yellowish-green. Lip as long as the ovary, 3 times 

 as long as the spur. Can. to Va. W. to 111. July, Aug. 



10. O. TRiDENTATA. Willd. (Habenaria. Hook. Gymnadenia. Lindl.) 

 Radical If. solitar)', oblong, obtuse, cnuline'i — 3, much smaller; .";<:;>. cam- 



panulate, obtu.se, converging ; lip lanceolate, 3-toothed, at the extremity ; spur 

 filiform, curved, clavate, longer than the ovary. — Grows in woods and swamps, 

 Can., Mich., Penn., Va. Stem slender, 1 — 2f high, with small, greenish-white 

 flowers in a short and rather loose spike, appearing in July. 



