152 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



6. OPHRYS L. Twayblade. 



Stems slender and delicate, 10 to 20 cm. high, from fibrous creeping roots; flowers 

 small, greenish, in few-flowered racemes; leaves 2, opposite, reniform, thin, near the 

 top of the stem. ~ l^t'S&re-^ c^rdcctf^-' 



1. Ophrys nephrophylla Rydb. Bull. Torrey Club 32: 610. 1905. 



Listera nephrophylla Rydb. Mem. N. Y. Bot. Gard. 1: 108. 1900. 



Type locality: Spanish Basin, Montana. 



Range: Alaska and Oregon to Montana and New Mexico. 



New Mexico: Horsethief Canyon; Upper Pecos. Damp woods, in the Canadian 

 and Hudsonian zones. 



7. EPIPACTIS R. Br. Helleborine. ' 



A rather tall coarse-leaved plant from a creeping rootstock; inflorescence racemose; 

 flowers few, pediceled, conspicuously bracteate; capsule reflexed at maturity. 



1. Epipactis gigantea Dough; Hook. Fl. Bor. Amer. 2: 202. pi. 202. 1839. 



Type locality: "N. W. America. On the subalpine regions of the Blue and 

 Rocky mountains." 



Range: Washington and California to Texas. 



New Mexico: Mimbres; Grand Canyon of the Gila; Mangas Springs. Damp woods, 

 in the Transition Zone. 



8. COELOGLOSSTJM Hartman. Bracted orchis. 



Stems erect, rather stout, succulent, from a bifid fusiform tuber; leaves oblong- 

 elliptic to lanceolate, the lower obtuse, the upper acute; inflorescence a few-flowered 

 spike with conspicuous lanceolate spreading bracts.- / ^£^ r/0<;2VV '< x _ y j/»/a£Sr [/dr. 

 1. Coeloglossum bracteatum (Willd.) Pari. Fl. Ital. 3: 409. 1858. kracteafa^ 



Orchis bracteata Willd. Sp. PL 4: 34. 1805. 



Habenaria bracteata R. Br. in Ait. Hort. Kew. ed. 2. 5: 192. 1813. 



Type locality: "Habitat in Pennsylvania." 



Range: British America south to North Carolina and New Mexico. 



New Mexico: Ilillsboro Peak; Upper Pecos River; Winsors Ranch. Cold woods. 



9. LIMNORCHIS Rydb. Bog orchis. 



Erect herbaceous perennials, with succulent greenish stems arising from elongated 

 rootlike tubers and bearing slender, more or less crowded spikes of inconspicuous 

 greenish or white flowers. 



The plants occur in cool, moist situations in shaded thickets in rich soil. They have 

 usually been referred to the genus Habenaria and are so treated in the latest revision 

 of the genus. 1 We prefer the treatment of Doctor Rydberg, 2 which is followed here 

 so far as it relates to New Mexican species. 



KEY TO THE SPECIES. 



Leaves short, 3 to 7 cm. long, the lowest usually largest 1. L. brevifolia. 



Leaves much longer, 8 to 20 cm. long, the lowest shorter than 

 those along the middle of the stem". 

 Flowers white or nearly so; spur and lip various. 



Lip linear, not at all dilated at the base, 8 mm. long; 



spur over 10 mm. long; spike long, lax, slender. . . 4. L. sparsijlora. 



1 Ames, Oakes. Studies in the family Orchidaceae, fasc. 4. 



2 Rydberg, P. A. The American species of Limnorchis and Piperia north of Mexico. 

 Bull. Torrey Club 28: G05. 1901. 



