LEGUMINOSAE. 215 



Keel broader, only moderately falcate, 

 only the tip exposed. 

 Stems woody at base; herbage very 



silvery. L. holosericeus. 



Stems wholly herbaceous; herbage 

 not very silvery. 

 Leaflets 1-2.5 cm. long; procum- 

 bent seashore species. L. littoralis. 

 Leaflets 2.5-3.5 cm. long; erect 



subalpine plants. L. alpicola. 



Lupinus microcarpus Sims. Annual, villous with long hairs; stems erect, 

 10-60 cm. high; leaves mostly basal; stipules very slender; leaflets 7-11, 

 oblong, cuneate at base, obtuse, acute or emarginate, smooth above, villous 

 beneath, 2-5 cm. long; flowers in whorls, short-pedicelled; bracts subulate, 

 persisting; calyx villous, 2-lipped, the upper lip 2-toothed, the lower 3-toothed; 

 corolla cream-colored, more or less deeply tinged with purple, 12-15 mm. 

 long; keel ciliate; pod villous. 



In sandy ground, Vancouver Island to California; rare northward. 



Lupinus camosulus Greene. Annual, somewhat succulent; stems erect, 

 30-60 cm. high, usually simple; pubescence thin, appressed; leaflets 5-7, 

 oblanceolate, obtuse, mucronate, pubescent on both sides, 2-3 cm. long, on 

 longer petioles; flowers verticillate, in a loose raceme; bracts mostly exceeding 

 the calyx; corolla deep blue, 6-10 mm. long; keel ciliate. 



Willamette Valley, Howell, to Middle California. 



Lupinus micranthus Dougl. Annual; herbage villous; stemserect, 15-30 cm. 

 high; leaflets 5-7, linear or narrowly lanceolate, glabrous above, 8-20 mm. 

 long; petioles as long as the leaflets; racemes short; flowers nearly sessile; 

 bracts shorter than the calyx; calyx bilabiate, the upper lip 2-toothed, the 

 lower entire; corolla blue, 5-6 mm. long; keel ciliate; pods linear, pubescent, 

 5-7-seeded; seeds gray. 



In dry open ground, Washington to California. 



Lupinus bicolor Lindl. Very similar to L. micranthus; leaflets silky on 

 both sides; flowers on pedicels 4 mm. long; corolla larger, 8 mm. long; seeds 

 brown. 



Fort Vancouver, Douglas, to California. 



Lupinus laxiflorus Dougl. Rather slender, about 60 cm. high; pubescence 

 finely silky, but the plant green; leaflets 6-11, oblanceolate, obtuse or acute, 

 silky on both sides, 3-4 cm. long; petioles slender, usually twice as long as the 

 leaflets; racemes loose, 10-15 cm. long; pedicels slender, 5-6 mm. long; 

 calyx short, spurred at base; corolla about 1 cm. long; standard glabrous or 

 pubescent. 



Open pine woods, rare in our limits. 



Lupinus polyphyllus Lindl. Perennial; herbage green, sparsely pubescent; 

 stems erect, 1-2 m. high, one to several arising from the same root; leaflets of 

 the lower leaves 10-16, lanceolate, 6-14 cm. long, glabrous above, silky pubes- 

 cent beneath; stipules triangular-subulate, large; petioles long; racemes 20-40 

 cm. long, densely flowered; flowers long-pedicelled; calyx silky, the lips entire; 

 corolla violet-blue, 12-14 mm. long; keel not ciliate; pods dark, loosely hairy. 



In wet meadows, Vancouver Island to Oregon. A very showy plant, 

 often cultivated. 



Lupinus columbianus Heller. Perennial, with several stems usually 

 arising from the same crown; pubescence thin, short and appressed; stems 

 branched, 60-80 cm. high; leaflets 6-9, oblanceolate, mostly acute, 4-5 cm. 



