ORCHIDACELE. (ORCHIS FAMILY.) 843 



■1- 4- Scape or ztem naked above, one-ieaved at the bate. 

 4. IT. Obtusata, Richardson. Leaf obovute or spatulaKHjblonjr : npper 



sepal very broad and rounded: lip deflexed, about the length <jf the tapering 

 and curving spur: vnther-cells arcuate and widely .sei>aruled. — Colorado aud 

 northward, theuce eastward across the continent. 



6. 3PIRANTHES, Kichaiti. Ladies' Tresbes 



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

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



1. S. Romanzoffiana, Cham. Glabrous, rather stout, 4 to IH inchea 

 high: leaves oblong lanceolate to linear: spike den.se, 3-nuiked, conspicuouuiy 

 bracteate, 1 to 4 inches long: perianth curved; lip recurved, contracted U-low 



tlie rounded wavy-crenulate summit ; callosities smooth, often obi»cur«. 



From Coloradc northward and ranging across the continent. 



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



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

 stock creeping, with fibrous fleshy rootlets. 



1. G. Manziesii, Lindl. Scape and inflore.scence pubescent: leaves 

 smooth, ovate-oblong to oblong-lanceolate, reticulated with light greeni.^h 

 markings: spike many-flowered, rather dense, secund : perianth white, pul.eru- 

 lent : column short and straight : gland and Ijifid 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 tn.^ 

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

 raceme. 



1. Lo COnvallarioides, Nutt. Stem slender, 3 inches to a foot hiph. 

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

 leaves just below the raceme : injforescaice jJuhcsccnl : sepals and petals linear; 

 lip oblong-ovate and ciaieate, 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 dk smooth racaiie: sepals ovate ; lip 

 linca.r. — Same range as last. 



8. EPIPACTIS, HalUr. 



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

 Column short, erect. — Stem from creeping rootstocks : flown-s fi-w and |iodi- 

 celled, with conspicuous bracts divergent, and the ovarits at light angles to 

 the stem. 



1. E. gigantea, Dougl. One to four feet higli, nearly smooth : l«'iivcji 

 from ovate below to narnnvlv l.mr.'obit.- above, somewhat .scabrous on tho 



