44 Rydberg: Rocky Mountain flora 



cm. long, velutinous ; leaflets 7—10, narrowly oblanceolate, usu- 

 ally conduplicate, densely silky on both sides, acute, 2-4 cm. 

 long; racemes dense, 5-10 cm. long; bracts subulate, shorter 

 than the buds ; calyx gibbous, villous ; lower lip lanceolate, 7 

 mm. long ; upper lip ovate, 5-6 mm. long ; corolla about 10 mm. 

 long, light-purple or pink ; banner with a darker spot, pubescent 

 without; legume 2—2.5 cm. long, 7 mm. wide, densely silky- 

 villous, 3-4-seeded. 



In general habit, size, form, and color of the corolla and leaf- 

 lets, this resembles L. dccitinbcus very closely, but differs in the 

 dense, short, spreading pubescence of the stem and the denser, 

 longer, looser pubescence of the leaves. These characters place 

 it in the same group as L. Bakcri and L. dichrous, which it other- 

 wise little resembles. It grows on dry plains and hills. 



Wyoming : Snake River, 1894, Aven Nelson logS (type in herb. 

 Columbia Univ.); Evanston, 1882, N. L. Britton. 

 Utah: Divide, \^g^, Isabel Mulford 268. 



Lupinus macrostachys 



Perennial with a short caudex ; stem 5—10 dm. high, puberu- 

 lent and with long silky spreading or reflexed hairs ; stipules 

 setaceous; petioles short-pubescent with spreading hairs, 2-10 

 cm. long ; leaflets 7—8, linear- oblanceolate, acuminate, 3-6 cm. 

 long, appressed-silky on both sides, grayish-green ; raceme dense, 

 2—3 dm. long ; bracts lanceolate, acuminate, merely equaling the 

 buds ; calyx velutinous, gibbous ; lower lip broadly lanceolate, 

 obtuse, about 8 mm. long ; upper lip ovate, almost as long ; 

 corolla 10-12 mm. long, dirty- white, tinged with blue; banner 

 with a darker spot ; legumes fully 2 cm. long, densely silky- 

 villous, 4-5 -seeded. 



This species is related to L. leiicophylhis, from which it differs 

 in the less dense and strictly appressed silky pubescence (scarcely 

 canescent) and the color of the flowers. In L. lejicophylhis they 

 are rather light-blue or pink with darker striations (rarely white), 

 the banner with a lighter spot. It grows at an altitude of about 

 1000 m. 



Montana : Jocko Creek, 1901, D. T. MacDoiigal 2§j (type 

 in herb. N. Y. Bot. Card.). 



Lupinus roseolus 



Perennial with a cespitose caudex ; stems ascending or de- 

 cumbent, about I dm. high, sparingly strigose, 3— 5-leaved, slender; 



