WESTERN SPECIES OF ARAGALLUS. 61 



yellowish flowers, its softer and mostly sparser pubescence and 

 greenish aspect will readily distinguish it. 



The following collections show this species to be of the moist 

 ground in the open woods of the mountains or hills : Type speci- 

 mens from Limestone Range in the Black Hills (Wyoming), No. 

 2545, July 30, 1896; Laramie Hills, July 22, 1897, No. 3428j 

 Medicine Bow Mts., near La Plata Mines, No. 5072, Aug. 22, 1898 

 (the last two Nos. by Mr. Elias Nelson). A specimen by Dr. 

 J. W. Blankiuship, in mature fruit, from Mystic Lake, Mont., Aug. 

 1, 1898, may be this species, and specimens by Dr. W. A. Burman 

 from Gladstone, Manitoba, July, 1897, distributed as Oxytropis 

 eampestria, must be similarly referred, as must, I think, Elmer's 

 No. 595 from Loomiston, Aug., 1897, distributed as 0. Lamberti. 



Aragallus dispar. Taproot strongly characteristic, rather 

 slender, gradually attenuated downward, 1-3 dm. long; caudex 

 very short, its branches few, crowded, densely clothed with the 

 membranous stipules which are covered with long, white, strigose 

 hair ; scapes few to several, moderately stout, distinctly tapering 

 upward, lightly silky-pubescent, somewhat unequal in length, 1-2 

 dm, high, nearly twice as long as the leaves ; leaves silky-pubescent, 

 crowded, erect, unequal, the primary short; leaflets 5-9 pairs; 

 those of the primary leaves small, from orbicular to oblong, often 

 only 5 mm. or less in length ; those of the longer leaves oblong to 

 linear, 7-12 mm. long; spikes short, dense, many flowered; bracts 

 from much shorter to nearly equaling the calyx; calyx half as 

 long as the corolla, silky-lanate, with minute, dark pubescence 

 underneath, short-tubular, its lobes merely short teeth, not more 

 than one-fourth as long as the tube ; corolla purple or ochroleucous 

 with a purple spot on the keel, 15-18 mm. long; pod oblong, taper- 

 ing into a short, thick point, pubescent, scarcely twice as long as 

 the calyx. 



A strongly marked species ; its slender, vertical taproot, taper- 

 ing scapes, two forms of leaves and leaflets and very short calyx 

 lobes are quite characteristic. The two colors of the flowers appear 

 in specimens from the same locality. Type specimen from Mrs. C. 

 R. Cook, Dickinson, N. D., June, 1896. Also collected by Dr. J. 

 W. Blankinship, Custer, Mont., June 7, 1890. 



++-M-M- Neither glandular nor viscid ; pod only half 2-celled or less. 



