464 ORCHIDACE^E. (ORCHIS FAMILY.) 



pals; column manifest. — Damp mossy woods, on the mountains of North 

 Carolina. July. — Stem 4' - 8' hi^di. Leaves 2'- 1' long. 



18. PONTHIEVA, R. Brown. 



Sepals and petals nearly alike, the two outer sepals spreading, the upper one 

 connivent with the petals. Petals, like the lip, adnate to the middle of the col- 

 umn. Lip posterior, clawed, ovate, concave, spreading. Column 2-lobed, 

 beaked. Anther dorsal, linear, stalked, 4-celled. Pollen-masses 4, lineai-, pow- 

 dery. — Low herbs, with clustered roots, cliiefly broad radical leaves, and green- 

 ish flowers on a pubescent scape. 



1. P. glandulosa, li. Brown. Leaves many-nerved, oblong, spreading, 

 narrowed into a short petiole ; scape slender, many-flowered ; bracts lanceolate ; 

 lateral sepals flat. (Cranichis multiflora, Nutt. Ophrys pubera, Michx.) — Low 

 shady woods, Florida to North Carolina. Sept. and Oct. — Scape 1°- 1|° high. 



19. CYPRIPEDIUM, L. Ladvs Slipper. 



Sepals 3, the two lower ones mostly united into one under the lip, spreading. 

 Petals narroAver. Lip large, inflated, and sac-like. Column short, 3-lobed, the 

 two lateral lobes each bearing a 2-celled anther on the under side, the middle one 

 (sterile stamen) petal-like. Pollen granular. Stigma thick, triangular. — Root 

 fibrous. Leaves large, plaited, sheathing. Flowers large, mostly solitary, leafy- 

 bracted, nodding. 

 * Stem lenfjj : sepals and petals longer than the yellow Up, the latter linear and twisted. 



1. C. pubescens, Willd. Pubescent; stem sheathed at the base; leaves 

 4-6, ovate-oblong, acute or acuminate; flowers 1-3; sepals greenish, striped 

 with deeper lines, lanceolate, acuminate, the lower sometimes 2-cleft at the apex ; 

 petals linear, spirally twisted; lip large (I'-l^' long), laterally flattened, spotted 

 within; stigma triangular, obtuse. — Rich woods in the upper districts, and 

 northward. May and June. — Stem 1°- 1^° high. Leaves 4' - 6' long. Flow- 

 ers inodorous. 



2. C. parviflorum, Salisb. Very near the preceding, but every way 

 smaller ; lip half as large, depressed above ; stigma triangular, acute ; flowers 

 fragrant. — Rich woods in the upper districts. May and June. 



* * Stem leafy : sepals and petals ickite.Jlat, obtuse, not longer than the lip. 



3. C. spectabile, Swartz. Pubescent ; leaves 6-7, oval, acute ; sepals 

 oval or olilong, rather longer than the lanceolate petals ; lip (1^' long) much 

 inflated, white tinged with purple, about as long as the sepals. — Mountains of 

 North Carolina, and northward. May and June. — Stem 2° high, commonly 

 2-flowered. Leaves 4' -6' long. Flowers very showy. 



* * * Scape naked, \-Jlowered, 2-leaved at the hase. 



4. C. acaule, Ait. Pubescent ; leaves oblong, obtuse ; sepals greenish, 

 oblong-lanceolate, acute, nearly as long as the linear petals, much shorter than 

 the large (2' long) obovate purple and veiny lip. — Dry woods in the upper dis- 

 tricts, and northward. May and June. — Scape 8' - 12' high. Leaves ^° long. 



