OKCHIDACEuE. (ORCHIS FAMILY.) 343 



♦- ■•- Scape or ztem naked above, one-leaved at the base. 

 4. "F".. obtlisata, Richardson. Leaf obovate or spatulate-oblong : upper 

 oepal very broad and rouuded : lip deflexed, about the length of the tapering 

 and curving spur : anther-cells arcuate and widely separated. — Colorado and 

 northward, thence eastward across the continent. 



5. 3PIRANTHES, Richard. Ladies' Tresses 



Dilated summit of the lip spreading and undulate. Column very short, 

 oblique, terminating in a stout terete stipe. — Flowers small, white. 



1. S. Romauzoffiana, Cham. Glabrous, rather stout, 4 to 18 inches 

 high: leaves oblong-lanceolate to linear: spike dense, 3-ranked, conspicuously 

 bracteate, 1 to 4 inches long: perianth curved; lip recurved, contracted below 

 the rounded wavy-crenulate summit; callosities smooth, often obscure. — 

 From Colorado northward and ranging across the continent. 



6 GOOD YE R A, R. Br. Rattlesnake Plantain. 



Scapes few-bracteate : leaves thickish, rosulate at the base, petioled : root 

 stock creeping, with fibrous fleshy rootlets. 



1. G. Manziesii, Lindl. Scape and inflorescence pubescent: leaves 

 smooth, ovate-oblong to oblong-lanceolate, reticulated with light greenish 

 markings : spike many-flowered, rather dense, secund : perianth white, puberu- 

 leut : column short and straight : gland and bifid beak very narrow and elon- 

 gated. — From Colorado northward, thence eastward along the northern 

 border to W. New York ; also in the Pacific States. 



7. LISTER A, R. Br. Twayblade. 



Sepals and petals similar : lip free, longer than the sepals. Column free 

 and naked. — Stems from fibrous and creeping roots : flowers small, in a loose 

 raceme. 



1. L, convallarioides, Nutt Stem slender, 3 inches to a foot high, 

 naked excepting one or two sheaths at base and the pair of orbicular or ovate 

 leaves just below the raceme : inflorescence pubescent : sc23als and petals linear ; 

 lip oblong-ovate and cuneate, with a small tooth on each side near the base. — 

 From the Sierra Nevada eastward across the continent. 



2. L. cordata, R. Br. Leaves smaller, triangular-ovate and somewhat cor' 

 date: flowers minute, on short pedicels in a smooth raceme: sepals ovate; lip 

 linear. — Same range as last. 



8. EPIPACTIS, Haller. 



Sepals and petals nearly equal : lip narrowly constricted in the middle. 

 Column short, erect. — Stem from creeping rootstocks : flowers few and pedi- 

 celled, with conspicuous bracts divergent, and the ovaries at right angles to 

 the stem. 



1. E. gigantea, Dougl. One to four feet high, nearly smooth : leaves 

 from ovate below to narrowly lanceolate above, somewhat scabrous on the 



