53a CXL. ORCHIDACEiE. Orchis. 



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

 2—3' in diameter, subcordate at base. 



6. TIP UL 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. disc5lor. Nutt. (Orchis. PL 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. — Fh. racemose or spicale. 



^ 1. Orchis vera. Lip broad, entire. Glands of the pedicels of the 

 pollinia enclosed. 



I. O. spECTABiLis. Showy Orchis. 



Lvs. about 2, nearly as long as the .scape ; Up obovate, undivided, crenate, 

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

 shorter than the ovary, bracts longer than the flower.— This pretty little j)lant is 

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

 fasciculate. Leaves few, radical, ovate, 3—6' long, I — * as wide. Scape 4 — 6' 

 high, acutely-angled, with a lanceolate, acute bract and 3 — 5 large, sho\v7 

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

 white or whitish, each about 8" long, ]^^y, Jn. 



^ 2. Platanthera. Lip narrow, entire. Cells of the anther icidely sepa- 

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

 of the pollinia naked. 

 - 2. O. ORBicuLATA. Pursh. (Platanthera. Lindl. Habenaria. Terr.) 



Ia-s. 2, radical, suborbicular, rather fleshy; scape bracteate ; v/>p€r sep. 

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

 sepals; .s;;7/r 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, greenih^h-white flowers. Lip | — 1' by 

 i— 1". Spur H— 2' long. Jl. 



3. O. HooKKRiANA. Wood. (Platanthera. Lindl. Habenaria. Torr.) 

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

 olate, nearly as long as the flowers ; vppcr sepal ovate, erect, lateral onrs deflcxed 

 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., Lapham ! rare. Resembles O. orbicu- 

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

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

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



4. b. iiYPERBORKA. Willd. (Habenaria hyp. & Huroncnsis. Spr. Pla- 

 tanth. Lind!.)—S'. leafy; lvs. very erect, acute; spike somewhat secund; 



