532 CXL. ORCHIDACE^E. ORCHIS. 



gle, purplish flower at top, as large as that of a Cypripedium. Leaf petiolate, 

 2 3' in diameter, subcordate at base. 



6. TIP TIL ARIA. Nutt, 



Tipula, the crane-fly ; from the fancied resemblance of the flowers. 



Segments of the perianth spatulate, spreading ; lip entire, sessile, 

 conspicuously spurred at base ; column wingless, free ; anther oper- 

 culate, persistent ; pollinia 4, parallel. 



T. DISCOLOR. Nutt. (Orchis. Ph. Limodorum uniflorum. Muhl.) 

 A slender, green-flowered plant, resembling a Corallorhiza, growing in 

 pine woods, Vt., Mid. States to Car. Root bulbous. Leaf solitary, petiolate, 

 ovate, plaited, smooth, and longitudinally veined. Flowers minute, greenish- 

 white, nodding, in a terminal raceme destitute of bracts. Jl. 



SECTION 2. Pollen cohering in waxy masses, which are pedicellate, 

 with glands at the base of the pedicels. Anthers of 2 distinct, 

 vertical cells. 



7. ORCHIS. 



The Greek name of these plants. 



Perianth ringent, the upper sepal vaulted ; lip entire or lobed, 

 produced at base into a spur which is distinct from the ovary ; anther 

 terminal ; pollinia 2, adnate, pedicellate. Fls. racemose or spicate. 



1. ORCHIS vera. Lip broad, entire. Glands of the pedicels of the 

 pollinia enclosed. 



1. O. SPECTABILIS. Showy Orchis. 



bvs. about 2, nearly as long as the scape ; lip obovate, undivided, crenate, 

 retuse ; segments of the perianth straight, the lateral ones longer ; spur clavate, 

 shorter than the ovary, bracts longer than the flower. This pretty little plant is 

 found in shady woods and thickets, among rocks, &c., U. S. and Can. Root 

 fasciculate. Leaves few, radical, ovate, 3 6' long, as wide. Scape 4 & 

 nigh, acutely-angled, with a lanceolate, acute bract and 3 5 large, showy 

 flowers. Segments of the perianth purple, ovate-lanceolate. Lip and spur 

 white or whitish, each about 8" long. May, Jn. 



fy 2. PLATANTHERA. Lip narrow, entire. Cells of the anther widely sepa- 

 rated at base by the broad, interposed stigma. Glands of the pedicels 

 of the pollinia naked. 



2. O. ORBICULATA. Pursh. (Platanthera. Lindl. Habenaria. Torr.} 

 Lvs. 2, radical, suborbicular, rather fleshy; scape bracteate ; upper sep. 



orbicular, lateral ones ovate ; lip linear-subspatulate, nearly twice as long as the 

 sepals ; spur arcuate, compressed, clavate, twice as long as the ovary. A re- 

 markable plant, not uncommon in old woods and in thickets, Penn. to Can. and 

 W. States. Leaves lying flat upon the ground, 3 6' diam., rather inclining to 

 oval or ovate with the apex acute. Scape 1 2f high, sheathed with a few 

 bracts, bearing a raceme of numerous, greenish- white flowers. Lip f 1' by 

 J 1". Spur li 2' long. Jl. 



3. O. HOOKERI.INA. Wood. (Platanthera. Lit9dl. ' Habenaria. Torr.) 

 Lvs. 2, radical, suborbicular or suboval, fleshy; scape naked; bracts lance- 

 olate, nearly as long as the flowers ; upper sepal ovate, erect, lateral ones deflexed 

 and meeting behind ; pet. acute, lip lanceolate, projecting, acuminate, a little 

 longer than the sepals ; spur subulate, arcuate, about twice longer than the 

 ovary. Woods, Can., N. Eng. ! to Wis., Laphaml rare. Resembles O. orbicu- 

 lata, but is, very distinct. Scape 8 12' high, without a bract below the flow- 

 ers. Leaves 4 5' long, nearly or quite as wide. Flowers 12 18, in a straight 

 raceme, yellowish-green, the spur 912" in length. Jn. Jl. 



4. O. HYPERBOREA. Willd. (Habenaria hyp. & Huronensis. Spr. Pla- 

 tanth. Lindl.) St. leafy; Ivs. very erect, acute; spike somewhat secund 



