214 LEGUMINOSAE. 



in terminal spikes or racemes; calyx 2-lipped, the upper lip often 

 bifid, the lower sometimes 3- toothed; standard orbicular with 

 reflexed sides; wings obovate, united at the summit and enclosing 

 the falcate keel; stamens united into a closed tube; ovary sessile; 

 pod more or less flattish, leathery and hairy. 



Annuals. 



Corolla 15 mm. long; pod short, ovate, villous, 1 or 2- 



seeded. L. microcarpus. 



Corolla 6-8 mm. long; pods linear, silky, 4-6-seeded. 

 Bracts equalling or exceeding the calyx; plant suc- 

 culent. L. carnosulus. 

 Bracts much shorter than the calyx; plants not suc- 

 culent. 



Flowers subsessile, 6 mm. long. L. micranthus. 



Flowers distinctly pedicelled, 8 mm. long. L. tricolor. 



Perennials. 



Calyx saccate or spurred at base. L. laxiflorus. 



Calyx symmetrical or nearly so. 



Pubescence thin, never silky or villous; leaves gla- 

 brous above. 

 Leaflets 1(M6, very large, 6-14 cm. long; stems 



usually simple; pods loosely villous. L. polyphyllus. 



Leaflets 6-^9, 4-9 cm. long; stems usually branched; 



pods thinly pubescent. L. columbianus. 



Pubescence either silky or villous. 



Herbage more or less villous with loose hairs, 



never silky. 

 Keel ciliate; corolla 8-10 mm. long; alpine 



plant, 10-20 cm. high. L. volcanicus. 



Keel naked; corolla larger. 



Corolla 15-18 mm. long; pubescence long 

 villous; somewhat fleshy plant of the 

 seacoast. L. nootkatensis. 



Corolla 12-16 mm. long; pubescence thin, 



short- villous; subalpine plant. L. subalpinus. 



Herbage silky, often silvery. 



Stems dwarf, 7-15 cm. high; racemes short; 



high alpine species. 



Leaflets 5-8, acutish; standard elliptical. L. lyallii. 

 Leaflets 7-10, obtuse; standard orbicular. L. breweri. 

 Stems taller; racemes usually elongate. 



Leaves mostly basal and the stems scape- 

 like. 

 Pubescence very silky and silvery; 



pods not villous. L. lepidus. 



Pubescence somewhat loose and shaggy, 



not silvery; pods villous. L. aridus. 



Leaves not mostly basal, the stems leafy. 

 Keel narrow, bent at nearly a right 

 angle, early exposed for much of 

 its length; pubescence thin. 

 Sterns tall, branched, 50-90 cm. 



high; root not much thickened. L. albicatdis. 

 Stems usually simple, 20 cm. high; 



root much thickened. L. gormani. 



