684 ORDER 138. ORCHIDACEuE. 



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

 Hookeriana, 2d Edit.) 



5 P. hyperborea Lindl. St. leafy ; ?tw. very erect, acute, lanceolate ; spike elon- 

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

 sep. deflexed ; petals and lip linear, obtttse, subequal, the latter somewhat lanceolate, 

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

 in mountainous woods and open meadows. N. Y. to Mich, and Can. Stems thick, 

 1 to 3 or even 4f high. Lvs. lanceolate, 4 to 7' by 1 to 1^'. Flowers greenish 

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

 spike. Jl. A conrser plant than the next, which it often approaches in the more 

 Blender variety HURONENSIS. 



6 P. dilatata Lindl. St. slender; Ivs. lance-linear and linear, acute ; spike many- 

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

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

 and rhomboid at base, about equaling the 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. often 

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

 ish. Spur about 4" long. JL (0. dilatata Ph.) 



7 P. bracteata Torn St. leafy; Ivs. oblong, obtuse, upper ones ncuto; spike lax; 

 bracts 2 to 3 times as long as tho flowers; sep. connivent, ovato; petals linear, 

 erect ; lip linear-cuneate, truncate, 3-toothed at the end, the middle tooth small or 

 obsolete ; spur short, inflated, obtuse. A small, green-flowered orchis, 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. Fls. yellowish-green. Lip as long as the ovary, 

 3 times as long as tho sack-like spur. Can. to Va,, W. to 111. JL, Aug. (Peri- 

 stylus Lindl.) 



8 P. flava Gray. St. teafy, lower Ivs. oblong, acute, upper lanceolate, acuminate ; 

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

 tooth each side at base ; palate with one tuberculate tooth ; spur filiform, 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 7' by f to 2', tapering 

 to an acute summit. Fls. in a long, thin spike. Sep. short, ovate, green. Petals 

 yellowish, drying brownish. Upper bracts about as long as the- floweis, 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 Ell.) . 



9 P. cristata Lindl. CRESTED ORCHIS. Slender, lower Ivs. lance-linear, very 

 acute, the sepal gradually reduced, linear, acuminate; spike oblon<r, densely 

 OO-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 slender- 

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

 2f high. Lvs. G to 10' long. Fls. 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 Ivs. lanceolate ; spike 

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

 long-lanceolate, deeply fringe-ciliate, twice longer than the linear, retched petals / 

 spur longer than the tlender-bealced ovary. Delicately beautiful, wiih 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 linear, very small, incised at the summit ; tho 

 lip narrow, lanceolate, conspicuously fringed, 4" long. Spur 1' in length. JL, 

 Aug. 



11 P. Blephariglottis Lindl. WHITE FRINGED ORCHIS. Lower Ivs. lanceolate, 

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

 Jlowers; petals spatulite, dentate at apex; Up lanceolate, ciliale, as long as the 



upper sepal, spur much longer than the long-beaked ovary In swamps, N. Y. 

 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 tho 

 last. Sepals roundish-oblong, lateral reflexed. Lip fringed in tho middle, 2 ''long. 

 Jn., JL 



