684 Obdbb 138.— OBOHIDAGBuS!. 



in a straight raceme, yellowish-green, the spur 9 — 12" in length. Jn., Jl. (0. 

 Hookerianaj 2d Edit.) 



5 P. hyperborea Liudl. St. leafy ; Ivs. very erect, acute, lanceolate ; spike elon- 

 gated, many-flowered; bracts linear-lanoeolate, acute, longer than the flower; 

 Sep. deflexed ; petals and lip linear, obtuse, subequal, ike latter somewhat lanceolate, 

 and about as long as the pendulous, obtuse spur. — A tall, leafy, variable species, 

 in mountainous woods and open meadows, N. T. to Mioh. and Can. Stems tMck, 

 1 to 3 or even 4f high. Lvs. lanceolate, i to 1' by 1 to IJ'. Mowers greenish 

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

 spike. Jl. — ^A coarser plant than the hext, which it often approaches in the more 

 slender variety Hueonensis. 



6 P. dilitata Lindl. St. slender; lvs. lance-linear and linear, acute; spike yjany- 

 flowered, virgate ; bracts lance-linear, about as long as the flowers ; upper sepal 

 ovate, obtuse, the lateral narrower and spreading; Up linear, entire, obtuse, dilated 

 and rhomboid at base, about equaling tlie petals, and a little shorter than the ob- 

 tuse, incurved spur, which is longer than the ovary. — Swamps, N. States (rare) 

 and Can. More slender and delicate than the last, 10' to 2f high. Lvs. ofl;en 

 narrow and grass-like 6 to 10' long. Fls. 10 to 50, pure white, varying to green- 

 ish. Spur about ^" long. Jl. (0. dilatata Ph.) 



7 P. braoteata Torr. St. leafy ; lvs. oblong, obtme, upper ones acute ; spike lax ; 

 bracts 2 to 3 times as long as the flowers; sep. connivent, ovate; petals linear, 

 erect ; lip linear-cuneate, irvmcate, 3-tooihed at the end, the middle toolhi small or 

 obsolete ; spur short, inflated, obtuse. — A small, green-flowered orcliis, in shades. 

 St. 6 to 9' high. Lvs. about 3, 18 to 30" by 6 to 12", upper bracts as short as 

 the flower. Spikes 2 to 3' long. Ms. yellowish-green. Lip as long as the ovary, 

 3 titties as long as the sack-like spur. Can. to Ta., W. to HI. Jl., Aug. (Peri- 

 stylus Lindl.) 



8 P. flava Gray. St. leafy, lower lvs. oblong, dcuie, upper lanceolate, acuminate ; 

 spike rather dense, cylindrio ; bracts longer than the fls. ; lip oblong, obtuse, with a 

 tooth each side at base ; palate with one tuberculate tooth ; spur flhform, rather 

 shorter than the sessile ovary. — In alluvial soils. North and South. St. flexuous, 

 12 to 18' high. Lvs. about 3, with long sheaths, 3 to 6 or T' by f to 2', tapering 

 to an acute summit. Ms. iu a long, thin spike. Sep. short, ovate, green. Petals 

 yellowish, drying brownish. Upper bracts about as long as the flowers, lower 

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

 (0. flava L. 0. herbiole and fuscescens Ph. 0. bidentata EIL) 



9 P. cristata Lindl. Crested Obchis. Slender, lower lvs. lance-linear, very 

 acute, the sepal gradually reduced, linear, acuminate ; spike oblong, densely 

 00-flowered ; sep. and pet. roundish {I to 2" long), the latter crenate ; lip oblong, 

 pinnately fimbriate, nearly as long as the spur which is half as long as the slemder- 

 ieated ovary. — Swamps, N. J. to Ga. and La. A delicate, yellow Orchis, 18' to 

 2f high. Lvs. 6 to 10' long. Pis. quite small, the sep. and pet. scarcely more 

 than 1" long, spur 2 to 3". Jn., Jl. 



10 P. ciliaris Lindl. .Yellow Fringed Orchis. Lower lvs. lanceolate; spike 

 oblong, dense, with numerous large fls. ; bracts shorter than the ovary ; lip. ob- 

 long-lanceolate, deeply fringe-eiliate, twice longer than the linear, notched petals; 

 spur longer than tlie slender-beaked ovary. — Delicately beautiful, with bright orange- 

 colored fls., in swamps. Can. and U. S., not common. St. about 2f high. Lvs. 

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

 roundish, obtuse, concave. Petals hnear, very small, incised at the summit ; tlio 



^ lip narro%v, lanceolate, conspicuously fringed, 4" long. Spur 1' in length. Jl, 

 Aug. 



11 P. Blepharigl6ttis Lindl. 'Whitb Pkingbd Orchis. Lower lvs. lanceolate, 

 channeled; spike oblong, dense ; bracts linear, acuminate, shorter than the white 

 flowers ; petals spatulate, dentate at apex ; lip lanceolate, ciliate, as long as the 

 upper sepal , spur muoli longer than the long-beaked ovary — In swamps, N. T. 

 to Car., resembing the last species, but distinguished, at least, by the color of its 

 fls. which are of a pure white. St. 1 to 2f high. Flowers fewer than in the 

 last. Sepals roundish-oblong, lateral refloxed. Lip fringed in the middle, 2" long. 

 Jn., Jl. 



