OKClIlUACK.i:. (OKCHIS FAMILY.) 501 



§ 2. Spur none ; the broad! 1/ (jibhous someiv/iat saccate btjse whoU j free from the 

 orari/ ; Jioicers lanjc for the genus, purple, unspotted, more expiindimj. 

 4. C. striata, Lindl. Plant purplish, stout (6- IG' hi^li), bearing 15-25 

 large flowers in a crowded spike, on very short pedicels; perianth 6-7" long; 

 lip oval or obovate, perfectly entire, concave, barely narrowed at the base, 

 where it bears 1 -3 short laniellaj ; all the parts of the perianth marked with 

 3 darker nerves; pod oblong (9" long). (C. Macraji, Gray.) — Woods, from 

 L. Erie westward ak)ng the Great Lakes and to the Pacific. 



7. HEXALECTRIS, Kaf. 



Sepals and petals nearly equal, somewhat spreading, several-nerved, not 

 gibbous nor spurred at base, free. Lip obovnle. with 5-6 prominent ridges 

 down the middle, 3-lobed above, the middle lo'e somewhat concave. Pollen- 

 masses 8, united into a single fascicle. Otherwise as in Corallorhiza. (Name 

 probably from 6|, six, and aXcKTpvwv, a cock, from the crests of the lip.) 



1. H. aphyllus, Kaf. Stem 1 -2° high, beset with purplish scales, the 

 lower sheatliing; flowers racemed, bracteate, brownish-purple, 6-8" long. 

 (Bletia apliylbi, Nuti.) — Rich woods, Ky. and Mo. to Fla. and Mex. 



8. LISTER A, K.Brown. Twavijlade. 



Sepals and petals nearly alike, spreading or reflexed. Lip mostly drooping, 

 longer than the sepals, 2-lobed or 2-cleft. Column wingless; stigma with a 

 rounded beak. Anther borne on the back of the column at the summit, erect, 

 ovate ; pollen powdery, in 2 masses, joined to a minute gland. — Roots fibrous. 

 Stem bearing a pair of opposite sessile leaves in the middle, and a spike or 

 raceme of greenish or brownish-purple small flowers. (Dedicated to Martin 

 Lister, an early and celebrated British naturalist.) 



* Column venj short ; sepals ovate, reflexed ; plants delicate, 4-8' hifjh. 



1. L. cordata, R. Brown. Leaves round-ovate, somewhat heart-shaped 

 1^-1' long) ; raceme smooth; flowers minute, crowded, on pedicels not longer 

 than the ovari/ ; lip linear, twice as long as the sepals, 1 -toothed each side at 

 base, 2-cleft. — Cold woods, N. J. to Mich., Minn., and northward. June. (Lu.) 



2. L. austr^lis, Lindl. Leaves ovate ; raceme loose and slender ; flowers 

 veri) small, on minuteli/ glandular-pubescent pedicels twice the length of the ovary ; 

 ///^ linear, 3-4 times the length of the sepals, 2-;jar/e</, the divisions linear- 

 setaceous. — Damp thickets, Oswego Co., N. Y., and from N. J. to Fla. June. 



* *- Column longer, arching or straightish. 



3. L. COnvallarioides, Nutt. Plant 4-9' high; leaves oval or round- 

 ish, and sometimes a little lieart-shaped (1-U'long); raceme loose, pubes- 

 cent; pedicels slender, lip wedge-oblong. 2-lobed at the dilated apex, and 1- 

 toothed on each side at the base, nearly twice the length of the narrowlv 

 lanceolate spreading sepals, ])ur])lish, f/ long. — Damp mossy woods, N. New 

 Eug. to Mich., ]Miun., and northward, and south in the mountains to N. C. 



9. SPIRANTHES, Richard. Laoiks' Tkesses. 



Perianth somewhat ringent, oblique on the ovary ; the sepals ami petals all 

 narrow, mostly erect or connivent, the three upper pieces sticking together 



