462 FABACEAE 



seeded. L. alsophilus Greene. Hillsides, border of woods, and mountain val- 

 leys: Mont. — Colo. — Utah. Submont. — Subalp. Je-Au. 



12. L. maculatus Rydb. Stem 4-6 dm. high; leaflets 5-7, those of the 

 lower leaves obovate-oblanceolate, mucronate, those of the upper oblanceolate 

 and acute, sparingly appressed-hairj' beneath, 3-5 cm. long; bracts ovate-lance- 

 olate, acuminate, deciduous; lips of the calyx ovate-lanceolate, the lower 7 mm. 

 long, the upper 6 mm. long; flowers 10-12 mm. long; banner light purple, with a 

 dark spot, glabrous, much shorter than the white or purple-tmged wings; keel 

 white, with purple tip; pods oblong, 2.5-3.5 cm. long, 4— 6-seeded. Hillsides: 

 e Utah — w Colo. Submont. — Mont. Jl-Au. 



13. L. floribundus Greene. Stems branched, leafy; leaflets 7-9, narrowly 

 oblanceolate, acute, 3-6 cm. long, strigose beneath; bracts lanceolate, shorter 

 than the calyx; upper lip of the calyx 3 mm. long, lance-ovate; lower lip lanceo- 

 late, 4 mm. long; corolla darker or lighter, blue or violet, about 6 mm. long; petals 

 subequal; pod 1.5-2 cm. long, 3-4-seeded. L. myrianthus Greene. (?) L. fulvo- 

 macuiatus Payson. Moimtain meadows: Colo. — Wyo.-r-Utah. Mont. Jl-Au. 



14. L. leptostachyus Greene. Stems leafy, 3-6 dm. high; leaflets 7-9, 

 narrowly linear-oblanceolate, 3-5 cm. long, strigose, but green beneath; bracts 

 lanceolate, about equalling the calyx; upper lip of the latter 3 mm., the lower 4 

 mm. long, both ovate, obtuse, merely retuse at the end; corolla pale blue, 6 mm. 

 long, the banner somewhat darker than the other petals, with a brownish ej'e. 

 Ledges: Colo. Submont. Je-Jl. 



15. L. parviflorus Nutt. Stems slender, 5-10 dm. high, branching; leaf- 

 lets 5-11, broadly oblanceolate to obovate, obtuse, 3-5 cm. long, slightlj' strigose 

 beneath, green; racemes 1-3 dm. long; bracts linear-subulate, equalling the calyx, 

 deciduous; lips of the calyx nearly equal, 6 mm. long, broadly lanceolate; corolla 

 light blue, sometimes white, about 6 mm. long; banner glabrous; legume 2-2.5 

 cm. long, 3-4-seeded. Meadows and among bushes: S.D. — Colo. — Utah — 

 Mont. Submo?it. — Alp. Je-S. 



16. L. calcaratus Kell. Stems 4-7 dm. high; leaflets 7-11, Unear-oblance- 

 olate, 3-5 cm. long, pubescent above, silvery-silky beneath; racemes slender, 

 6-12 cm. long; bracts subulate, caducous; calyx appressed-silky; lower lip longer 

 than the upper; coroUa from nearly white to purple, sometimes bi- or tri-colored; 

 banner slightly pubescent on the back; pod 2-5-seeded. L. midtitinctus A. Nels. 

 Hills and plains: Calif. — Utah — Ida.— Ore. My-Je. 



17. L. laxiflorus Dougl. Stems erect, 3-6 dm. high, slender; leaflets 6-10, 

 narrowly linear-oblanceolate, 3-5 cm. long, acute, short-strigose on both sides, 

 green; racemes lax, 1-2 dm. long; bracts subulate, shorter than the calyx; calyx 

 appressed-silky; upper lip lance-ovate, 5 mm. long, the lower lanceolate, 6 mm. 

 long; corolla blue, 8-10 mm. long; petals sub-equal; legume about 2 cm. long, 

 4-6-seeded. Meadows: Wash. — Cahf. — Ariz. — Mont. Submont. — Mont. My-Jl. 



18. L. aduncus Greene. Stems 3-10 dm. high, silky-canescent; leaflets 

 7-9, narrowly oblanceolate, 2-3 cm. long, acute, appressed-silky on both sides, 

 often conduplicate; raceme 1-2.5 dm. long; bracts ovate-lanceolate, shorter 

 than the calyx; calyx densely appressed-silky; lower lip lanceolate, 7 mm. long, 

 the upper ovate-lanceolate, nearly as long; corolla dark blue, about 10 mm. long; 

 petals subequal; pod 2-3 cm. long, 5-6-seeded. L. decumbens argophyllus A. 

 Gray. L. Helleri Greene. L. argophyllus Cockerell. Plains, caiions, and river 

 banks: Neb.— N.M.— Utah— Wyo. Submont.— Mont. My-Jl. 



19. L. argentinus Rydb. Stem 4-6 dm. high; leaflets about 7, oblance- 

 olate, densely silky on both sides, 3-5 cm. long; inflorescence rather short and 

 dense; bracts ovate-lanceolate, short, deciduous; flowers 10-12 ram. long; calyx 

 and pedicels densely white-silky; lower lip lanceolate, 7-8 mm. long, the upper 

 ovate, 5-6 mm. long; corolla bluish purple; banner pubescent on the back; pods 

 about 3 cm. long and 5-6-seeded. L. holosericeu's utahensis S. Wats. Hills: Utah 

 — Neb. Son. — Submont. Je-Au. 



20. L. lupinus Rydb. Stem 3-6 dm. high, densely canescent; leaflets 5-9, 

 oblanceolate, usually flat, 3-6 cm. long, appressed-canescent on both sides; 



