126 OHCHIDACEAE (ORCHID FAMILY) 



orbicular or ovate leaves just below the raceme: inflorescence pubescent: sepals 

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

 Slender, 1-2 dm. high, glabrous: leaves rounded-reniform, strongly veined and 

 reticulate, mucronate: flowers greenish, with oblong sepals and petals, much 

 shorter than the cleft Up: stamen incurved and depressed over the stigma: 

 capsule obovoid. L. cordata. — ^The central Rocky. Mountains. 



9. LYSIELLA Rydb. 



Small plant with a short rootstock and thick root fibers. Stem seapose, 

 with a single obovate leaf at the base. Flowers greenish-yellow. Lateral 

 sepals reflexed-spreading. Petals lanceolate; lip entire, linear-lanceolate; spur 

 shorter than the arcuate ovary. Beak of stigma not appendaged. Capsule 

 obovoid. — Habenaria in part. 



i. Lysiella obtusata (Pursh) Rydb. Mem. N. Y. Bot. Gard. 1: 104. 1900. 

 Leaf obovate or spatulate-oblong: uj)per sepal very broad and rounded: hp de-t 

 flexed, about the length of the tapering and cmTring spur: anther-cells arcuate 

 and widely separated. — Colorado and northward, thence eastward across tlw 

 continent. 



10. PERAMIUM Salisb. Rattlesnake Plantain 



Leaves thickish, all rosulate at the base, petioled, white-reticulate. Root- 

 stock creeping, with fibrous fleshy rootlets. Scapes few-bracteate, 2-4 dm. 

 high. Flowers spicate, bracted. Lateral sepals free, the upper one united 

 with the petals into a galea. Lip saccate, entire, without callosities and free 

 from the column. — Ooodyera. 



Lip with incurved margins, scarcely saccate 1. P. Menziesii. 



Lip with recurved margins, plainly saccate 2. P. ophioides. 



1. Peramium Menziesii (Lindl.) Morong, Mem. Torr. Club 5: 124. 1894. 

 Scape and inflorescence pubescent: leaves smooth, ovate-oblong to oblong- 

 lanceolate, reticulated with fight greenish markings: spike many-flowered, 

 rather dense, secund: perianth white, puberulent; column short and straight: 

 gland and bifid beak very narrow and elongated. — From Colorado northward, 

 thence eastward to western New York; also in the Pacific States. 



2. Peramium ophioides (Fernald) Rydb. in Brit. Man. 302. 1901. Scape 

 1-2 dm. high, glandular-pubescent: leaf-blade 1-2 cm. long, broadly ovate, 

 abruptly contracted into a short- winged petiole, dark green, generally with 

 the white blotches most conspicuous along the cross veins: flowers greenish- 

 white, 4-5 mm. long: galea concave with a short strongly recurved tip; lip 

 deeply saccate, with recurved margins and tip: anthers blunt. — ^Moist moun- 

 tain woods; Colorado to New England. 



11. CORALLORHIZA R. Br. Cobal Root ' 



Without green herbage, the soUtary scape with 2-4 membranaceous sheaths, 

 and bearing a simple raceme of brownish, yellowish, or purple flowers; pedicels 

 reflexed in fruit. Petals and sepals ascending, similar and nearly equal, but 

 the lateral sepals obfique at base and either decurrent in a short spur adnate 

 to the side or summit of the ovary, or forming a projecting gibbosity aboveiit. 

 Column narrowly margined, broader at base, somewhat incurved. 



Spur present, small or sac-like, at summit of the ovary. 



Lip deeply 3-lobed ,• •. ^ 1. C. multiflora. 



Lip 2-toothed Or 2-lobed above the base . , , . , . 2. C. innata. 

 Spur absent; the lip entire . , , , • , , , , . 3, C. striatal 



