ORCHIDACEJE. 



380 SPIRANTHES. 



2. P. VERTICILLa'ta. Br. Arethusa. Willd. 



Leaves 5, oblong-lanceolate, verticillate ; /ojoer solitary, the 3 outer petals 

 very long 'linear j^inner ones shorter, lanceolate, obtuse ; lip 3-lobed, the mid- 

 dle 'lobe undulate. Swamps. Stem 8— 12inches high, with a whorl of leaves 

 near the top and a flower 1—2 inches above it. Leaves 1| inch long, ^ as 

 wide abruptly acuminate. The flower is remarkable for its sepals being 

 about '^ inclies long, very narrow, and of a greenish brown color. Lip crested 

 in the middle. July. Whorled Pogonia. 



10. TRI'PHORA. 

 Segments of the perianth distinct, equal and converging; 

 lip nearly beardless, unguiculate; column spathulate, even, 

 flattened, wingless; pollen farinaceous. 



Named in reference to its usual number of flowers. 

 T. Pe'ndula. JVm«. * Pogonia. Lindl. 



Root tuberous; stem leafy, about 3-flowered at the top; haves clasping, 

 ovate, alternate ; floicers axillary, nodding ; Up entire, scabrous, not bearded ; 

 fruit pendulous. A small, delicate plant, in swamps, &c. Stem scarcely 6 

 inches high, slightly angled, with about 3 flowers, which from theb singular 

 form, sugges'^ the comnron name. Leaves 3— G, i— § inch long, § as wide, 

 purplish. Flowers white or greenish, the segments ot the perianth equal, 

 converging, and rather longer than the lip. Aug. Three-birds. 



11. CALOPO'GON. 



Segments of the perianth distinct ; lip on the upper side of 

 the flowers, unguiculate, bearded; column free, winged at 

 the summit; pollen angular. 



Gr. K-aXoi, beautiful, Trcaywv, beard; in allusion to the bearded lip. 

 C. PULCHELLUM. Br. Cymbidium pulchellum. P. 



Boof tuberous ; /m/ radical, ensiform, nerved; scape few-flowered; Up 

 erect, narrowed at base, with an expanded border, and a concave, hairy disk. 

 A truly beautiful plant, in swamps. Scape slender, 10—20 inches high, fur- 

 nished with a single, long leaf (8—12 inches long, i inch wide), sheathing its 

 base. Flowers 3 — 3, large, purple, remarkable for their inverted position ; 

 lip expanded at the end and fimbriate, on the upper side of the flower, while 

 the column is below. Petals and sepals expanded. Jl. Grass-Pink. 



12. SPIRA'NTHES. 



Flowers in a spiral spike; pelals connivent ; lip unguicu- 

 late, parallel with the column, entire, with 2 callous processes 

 at base; column free, clavate, bidentate at summit; ovary 

 oblique; stigma rostrate. 



Gr. a-TfiiQu,, a cord ; in reference to the twisted spike. 



1. S. gra'cilis. Beck. Neottia. Bw. 



Leaves radical, ovate, caducous ; scnpe sheathed ; flowers in a spiral row ; 

 Up obovate, curled. A very delicate plant, not uncommon in old woods. 

 Scape leafless, with several remote, sheathing scales, very slender, and 8—12 

 inches high. Leaves 3—4, close to the ground, 1—2 inches long,^ as wide, 



