Rydberg : Rocky Mountain flora 45 



stipules setaceous ; petioles 1—3 cm. long, slender, usually red- 

 tinged ; leaflets about 7, narrowly linear-oblanceolate, acute, 1-2 

 cm. long, sparingly silky, short-strigose ; raceme 2—4 cm. long ; 

 bracts subulate, shorter than the buds ; calyx gibbous, silky with 

 short spreading hairs ; lips broadly lanceolate, subequal, 5-6 mm. 

 long ; corolla nearly white, tinged with rose, about 8 mm. long ; 

 pod densely silky, perhaps 1.5 cm. long when fully developed. 



This resembles L. argentciis in the form and color of the flow- 

 ers. It has also the peculiar hue and pubescence of that species, 

 but it is a much smaller plant and of a different habit. The latter 

 will place it near L. Lyallii. It is an alpine plant growing at an 

 altitude of 3000 m. 



Wyoming : Continental Divide, Buffalo Fork, August 1897, F. 

 Tivecdy 2^0. 



Lupinus scaposus 



Annual, with sessile clasping cotyledons ; stem branched at the 

 base, 1-1.5 cm. high, sparingly ciliate ; stipules lanceolate, acumi- 

 nate ; petioles 3—5 cm. long, ciliate, slender ; leaflets about 7, 

 spatulate, i cm. long, sparingly silky-hirsute on both sides or 

 glabrous above ; peduncles longer than the leaves, ciliate ; raceme 

 short, 1—4 cm. long ; bracts lanceolate, short ; calyx ciliate, the 

 lower lip broadly lanceolate, entire, 5 mm. long, the upper 2-cleft, 

 ovate ; corolla purplish, 6 mm. long, paler at the base ; banner 

 shorter than the wings ; legume ciliate, i cm. long, 6 mm. wide, 

 2-seeded. 



In habit mostly resembling L. brcvicaiilis but more evidently 

 caulescent, with longer peduncles. The most distinctive char- 

 acters, however, are the different calyx and its entire lower lip. 

 This associates it with L. pusillus, from which it differs in the long 

 peduncles and smaller flowers. 



Colorado: Glenwood Springs, 1899, Geo. E. Osterliout. 



Lupinus rubens 



Annual, with sessile, clasping cotyledons ; stem ciliate, tinged 

 with red, branched near the base, about i dm. high ; petioles 

 densely ciliate, 2-4 cm. long ; leaflets ^-7, spatulate, 1-1.5 cm. 

 long, ciliate on both sides or glabrous above, acute ; raceme lax, 

 5-10 cm. long, overtopping the leaves ; bracts minute, subulate; 

 calyx ciliate, the lower lip lanceolate, 5 mm. long, the upper barely 

 3 mm. long ; corolla 7 mm. long ; banner dark-purple with a yellow 

 spot ; wings and keel lighter, tinged with lilac. 



