464 FABACEAE 



30. L. pulcherrimus Rydb. Stems 3-6 dm. high, leafy; leaflets 7-9, linear- 

 oblanceolate, acute, appressed-silky on both sides, but green; raceme more or 

 less elongate and rather dense; bracts lanceolate, short-acuminate, shorter than 

 the buds, deciduous; calyx grayish silky; lips lanceolate, the lower 6 mm. long, 

 the upper somewhat shorter; corolla dark purple; banner with a light spot, 

 pubescent on the back; pods 3-3.5 cm. long, 5-6-seeded. Meadows: B.C. 

 Colo. Utah Mont. Mont. Subalp. My-Au. 



31. L. flexuosus Lindl. Stem 4-5 dm. high, striate, leafy; leaflets 7-10, 

 narrowly oblanceolate or linear-oblanceolate, densely appressed-silky on both 

 sides, 2-4 cm. long; raceme dense, 1-1.5 dm. long; calyx appressed silky-canes- 

 cent, scarcely gibbous; lower lip 8 mm. long, narrowly lanceolate, the upper 

 ovate-lanceolate, 6 mm. long; corolla dark blue, with keel and a spot on the 

 banner, light-colored, about 1 cm. long; banner rather densely pubescent with- 

 out. L. subulatus Rydb. Plains: Mont. Wash. (? Utah). Plain Submont. 



32. L. tenuispicus A. Nels. Stem 3-7 dm. high, silvery-silky; leaflets 

 6-9, narrowly oblanceolate, 4-6 cm. long, silvery-silky, with long hairs; spike 

 slender, crowded, 5-15 cm. long; bracts linear-lanceolate, shorter than the calyx; 

 lips subequal; corolla blue or purple, 6-7 mm. long; banner pubescent on the 

 back; pods 1-3-seeded. Mountains: Ore. Wash. Ida. Au. 



33. L. Greenei A. Nels. Stems several, usually erect; leaflets 7-10, narrowly 

 oblanceolate, densely appressed silky-canescent, 2-5 cm. long, obtuse, mucronate; 

 calyx densely canescent; lower lip lanceolate, 6-7 mm. long, the upper slightly 

 shorter; corolla 7-9 mm. long; petals subequal, dark bluish purple; banner hairy 

 outside, with a light brownish spot; pod about 1.5 cm. long, 3-seeded. L. oreo- 

 philus Greene. River banks and benchland: Ore. Nev. Utah Colo. Wyo. 

 Submont. My-Jl. 



34. L. Rydbergii Blankinship. Stems several, about 3 dm. high; leaflets 

 8-10, oblanceolate, 2-4 cm. long, coarsely canescent; racemes 8-14 cm. long; 

 bracts linear, scarcely exceeding the buds; calyx canescent, gibbous; lower lip 

 7 mm., upper lip about 5 mm. long; corolla dark blue, about 10 mm. long; banner 

 with a light spot, glabrous; legumes 3-5-seeded. Hills: Mont. Ida. Plain 

 Submont. My-Je. 



35. L. humicola A. Nels. Stems several, erect or ascending, 3-6 dm. high, 

 few-leaved; leaflets 7-12, narrowly oblanceolate, appressed-silky on both sides, 

 4-7 cm. long; raceme dense, 1-2 dm. long; bracts lanceolate, shorter than the 

 buds; corolla blue, about 1 cm. long; banner glabrous, with a light spot; pod 

 2.5^1 cm. long, normally 6-seeded. Hills and mountain slopes: Colo. Mont. 

 Submont. Mont. Je Au. 



36. L. Hellerae Heller. Stems several, clustered, erect, 3-4 dm. high, few- 

 leaved; leaflets 7-9, narrowly oblanceolate, 45 cm. long, acute; bracts narrowly 

 lanceolate, shorter than the buds; calyx-lobes lanceolate, the lower 8 mm., the 

 upper 7 mm. long; corolla dark blue, 12-15 mm. long; banner with a lighter spot, 

 nearly glabrous; legume 2.5-3 cm. long, 4-6-seeded. Sandy and gravelly soil: 

 Ida. Submont. My. 



37. L. ornatus Dougl. Stem erect or decumbent at the base, leafy, 5-10 

 dm. high; leaflets 5-9, oblanceolate, 4-8 cm. long, acute, appressed silky-canes- 

 cent; racemes 7-20 cm. long; bracts lanceolate, usually shorter than the buds; 

 calyx silky-canescent; lower lip lanceolate, 10-12 mm. long, the upper ovate- 

 lanceolate, 9-10 mm.; corolla dark blue; banner with a light spot, somewhat 

 pubescent on the back; legume 2.5-3.5 cm. long, 5-7-seeded. Hillsides and 

 plains: Ida. (? Mont.) Wash. Plain Submont. Ap-Je. 



38. L. leucopsis Agardb. Stems 4-8 dm. high; leaflets 6-12, densely ap- 

 pressed silky-canescent, oblanceolate, 3-6 cm. long; raceme dense, 1-2 dm. long; 

 bracts lanceolate, slightly exceeding the flower-buds; calyx densely canescent; 

 lower lip lanceolate, 7-8 mm. long, the upper ovate-lanceolate, about 6 mm. 

 long; corolla blue; banner with a light spot, densely hairy outside; pod 2.5-3 cm. 

 long, about 5-seeded. L. sericeus Wats., in part. L. axillaris Blankinship. 

 Plains: Wash. Ore. Nev. Wyo. Sask. Plain Mont. My-Au. 



