234 PRIMULACEJ3. (PRIMROSE FAMILY.) 



3. DOUGLASIA, Lindl. 



Depressed and tufted herbs : the stems branching, persistent : the leaves 

 small, linear, imbricated or rosulate on the branches, or some of them scat- 

 tered and alternate. In ours the flowers are solitary, terminating the leafy 

 shoots, and the tube of the corolla barely equals the calyx. 



1. D. montana, Gray. Pulvinate-cespitose, 1 or 2 inches high, nearly 

 glabrous : leaves subulate, minutely somewhat ciliate, 2 lines long, somewhat 

 interruptedly imbricate-clustered : pedicel 1 to 2-bracteolate near the calyx : 

 corolla-lobes cuneate-obovate, 2 lines long. — Proc. Am. Acad. vii. 371. Moun- 

 tains about Helena, Montana, and Owl Creek Mountains, Wyoming. 



4. AWDROSACE, Tourn. 

 Small annuals or perennials of various habit : flowers umbellate, white. 



* Perennials, proliferously branched at base and cespitose: leaves rosulate-imbri- 



cated at the base of the many-flowered scapes : capsule usually few-seeded. 



1 . A. Chamsej asme, Host. Leaves in more or less open rosulate tufts, 

 from lanceolate to oblong-spatulate or ovate, carinate 1-nerved, their margins 

 (at least), the scape (1 to 3. inches high) and the somewhat capitate umbel 

 villous with many-jointed hairs : corolla white with yellowish eye. — Alpine 

 from Colorado and northward to the Arctic coast. 



* ♦ Annuals, acaulescent, with slender root, an open rosulate circle of leaves, and 



naked scapes, bearing an involucrate umbel : capsule many-seeded. 



h- Calyx-tube obpyramidal in fruit, whitish with conspicuous green teeth, which 



mostly surpass the capsule. 



2. A. OCeidentalis, Pursh. Minutely pubescent, not over 3 inches high: 

 radical leaves and those of the conspicuous involucre oblong-ovate or spatulate, 

 entire, sessile : scapes diffuse : bracts of the involucre ovate or oblong : lobes of 

 the calyx as long as the tube : lobes of the corolla oblong, shorter than the 

 calyx. — From New Mexico to the head-waters of the Missouri and eastward 

 to the Mississippi. 



3. A. septentrionalis, L. Almost glabrous : leaves lanceolate or oblong- 

 lanceolate, narrowed at base, from irregularly denticulate to laciniate-toothed : 

 scapes erect, 2 to 10 inches high : bracts of the small involucre subulate : lobes of 

 the calyx mostly shorter than the tube : lobes of the corolla obovate, rather 

 longer than the calyx. — High alpine to much lower, from New Mexico and 

 Nevada to the Arctic coast. 



Var. subulifera, Gray. Lobes of the calyx slender-subulate, as long as the 

 tube, surpassing the corolla. — Synopt. Fl. ii. 60. Mountains near Boulder 

 City, Colorado, and San Bernardino, California. 



•<- +- Calyx-tube hemispherical in fruit; the short teeth barely greenish and rather 

 shorter than the capsule. 



4. A. filiformis, Retz. Glabrous : leaves and scapes (1 to 4 inches high) 

 nearly as in the preceding or more capillary : flowers less than a line and 

 globose capsule only a line long : calyx-teeth broadly triangular, shorter than 

 the very small corolla. — Mountains from Colorado and Utah to Wyoming. 



