PEA FAMILY 463 



racemes 5-10 cm. long; bracts lanceolate, 3-4 mm. long, deciduous; calyx silvery; 

 -upper hp scarcely 3 mm. long, the lower 5 mm. long; corolla about 1 cm. long, 

 dark blue or purple; banner with a light spot; pod 3 cm. long, 3-seeded. Along 

 streams and in meadows: Utah. Submont. Mont. Jl-Au. 



21. L. flavescens Rydb. Stem about 3 dm. high; leaflets about 7, oblance- 

 olate, 3-4 cm. long, appressed-silky on both sides; inflorescence short; bracts 

 lanceolate, early deciduous; calyx densely pubescent with short spreading hairs, 

 gibbous at the base, its lips almost equal in length, about 8 mm. long; corolla 

 pale yellow; banner with a darker spot, glabrous. Prairies: Ida. Mont. Je. 



22. L. sulphureus Dougl. Stems 4-8 dm. high; leaflets 7-10, oblanceolate, 

 yellowish green, softly strigose on both sides, 3-5 cm. long; raceme 1-2 dm. long, 

 rather lax; bracts lanceolate, shorter than the calyx; calyx more or less spurred 

 at the base, short-pubescent with spreading hairs; lower' lip lanceolate, about 6 

 mm. long, the upper ovate, 5 mm. long; seeds 4-5. Plains: Ida. Wyo. Utah- 

 Ore. Son. Submont. Je-Au. 



23. L. lucidulus Rydb. Stem 5-6 dm. high, branched above, especially 

 the upper portions, leafy; leaflets 7-8, linear-oblanceolate, silky and silvery on 

 both sides, about 3 cm. long; raceme 1-2 dm. long, lax; flowers scattered; pedicels 

 and calyx densely pubescent with short strictly appressed silky hairs; lower hp 

 of the calyx about 5 mm. long, lanceolate, almost twice as long as the short 

 ovate upper one; corolla yellow or light pink; banner slightly exceeding the 

 wings, with a darker spot. Hills: Wyo. Submont. Au. 



24. L. albicaulis Dougl. Stem 3-10 dm. high, straw-colored; leaflets 

 oblanceolate, 3-5 cm. long, short-pubescent on both sides; bracts subulate; calyx 

 with short spreading hairs; lips subequal; petals 10-14 mm. long, blue, violet or 

 whitish; banner glabrous; pods 3-6-seeded. Plains: Wash. Ida. Calif. Je-Jl. 



25. L. adscendens Rydb. Stem 4-6 dm. high, appressed-silky, leafy; 

 leaflets about 7, linear-oblanceolate, 4-5 cm. long, acute, appressed-silky on 

 both sides, but green; racemes elongate, narrow; flowers about 12 mm. long; 

 calyx grayish silky; lower lip 8 mm. long, slightly longer than the upper, both 

 lanceolate; bract linear-subulate, much longer than the buds, equalling the 

 calyx in length; corolla dark bluish purple; banner glabrous, with a lighter spot. 

 Mountains: Wyo. Utah. Submont. Jl. 



26. L. ingratus Greene. Stems several, 3-6 dm. high, sparingly strigose; 

 leaflets 7-9, narrowly oblanceolate, sparingly appressed-pubescent on both sides, 

 2-4 cm. long; inflorescence many-flowered; upper calyx-lip ovate, 3 mm. long, 

 the lower lanceolate, 4 mm. long; corolla white, 8 mm. long, the banner with a 

 brownish spot; pod 1.5-2 cm. long, 4- or 5-seeded. Hills: N.M. (? Colo.). 

 Submont. Jl-S. 



27. L. Macounii Rydb. Stems several, 3-6 dm. high, somewhat branched; 

 leaflets about nine, linear-oblanceolate, 2-3 cm. long, usually conduplicate, silky- 

 strigose on both sides; racemes dense, 5-10 cm. long; calyx gibbous at the base; 

 lower lip lanceolate, 6-7 mm. long, the upper hardly 4 mm. long, ovate; corolla 

 8-9 mm. long, dark blue, the banner with a lighter spot, somewhat shorter than 

 the wings; legume about 2 cm. long, 3-4-seeded. Plains and mountains: Sask. 



-Wyo. Mont. Plain. 



28. L. foliosus Nutt. Stems erect, 3-8 dm. high, branched, usually with 

 erect branches; leaflets narrowly oblanceolate, usually conduplicate, silky- 

 strigose on both sides, 2-5 cm. long; calyx densely silky-canescent; lower lip 

 lanceolate, 6-7 mm. long, upper lance-ovate, 5-6 mm.; corolla about 1 cm. long; 

 petals subequal; legume about 2 cm. long, 3-4-seeded. Hills and plains: Wash. 

 Ida. Colo. Mont. Je-Au. 



29. L. laxus Rydb. Stem 4-6 dm. high, slender; leaflets 7-9, linear or 

 linear-oblanceolate, 3-4 cm. long, green, but appressed-silky on both sides; 

 racemes slender and lax; bracts lanceolate, short-acuminate, not longer than the 

 buds; pedicels and calyx rather long-hairy; calyx not spurred; lower lip lanceo- 

 late, 5 mm. long, the upper slightly shorter; corolla light bluish purple; banner 

 broad, somewhat shorter than the wings. Meadows: Mont. Wyo. Submont. Jl. 



