LEGUMINOSAE. 1 45 



deciduous; calyx finely tomentose; upper lip short, slightly emarginate; 

 standard emarginate, glabrous; keel ciliate. Common near the lower timber 

 line at the head of the Touchet River in the Blue Mountains. A purple- 

 flowered form occurs rarely. 



Lupinus sulphureus Dougl. Stems erect, sparsely appressed-puberulent, 

 60-100 cm. high; leaflets 9-15, narrowly oblanceolate, usually folded, densely 

 puberulent on both sides but green; petiole much longer than the leaflets; 

 stipules subulate, villous, about 1 cm. long; raceme erect, rather dense, 10-20 

 cm. long; pedicels spreading, densely puberulent, shorter than the flowers; 

 calyx very silky, ebracteolate, somewhat saccate or very short-spurred at 

 base; corolla pale yellow, about 10 cm. long; standard glabrous; keel sparsely 

 ciliate; pods silky-villous. In the Blue and Craig Mountains. 



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, or none; 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. 



Lupinus burkei Wats. Green and glabrous or nearly so; stems erect, 

 60-100 cm. high; leaflets 6-11, oblanceolate, acute, glabrous above, sparsely 

 appressed-pubescent beneath; petioles of the lower leaves very long; stipules 

 lanceolate; racemes dense, 10-40 cm. long, the pedicels short, 2-4 mm. long; 

 bracts lanceolate, villous, somewhat persistent; calyx pubescent; corolla 

 blue-violet; standard glabrous; pods dark, 10-20 mm. long, 4-6-seeded, loosely 

 villous. In moist places, especially in meadows. 



Lupinus wyethii Wats. Villous, not silky, erect, 30-50 cm. high; leaflets 

 7-11, oblanceolate, acute or acuminate, 2-4 cm. long, glabrous above; petioles 

 2-4 times as long as the leaflets; racemes strict, 15-30 cm. long; pedicels 

 slender; flowers dark-blue, 10-15 mm. long; standard glabrous. A very showy 

 species, locally abundant. 



Lupinus leucophyllus Dougl. Densely silky-villous and somewhat tomen- 

 tose, erect, 60-90 cm. high; leaflets 7-10, oblanceolate, acute or acuminate, 

 pubescent on both sides, 3-6 cm. long; petioles about as long or longer; flowers 

 sessile or nearly so, in elongated short-peduncled dense racemes, often 30-40 

 cm. long; standard somewhat hairy on the back. Common in low ground. 



Lupinus retrorsus Henderson. Stems erect, 60-90 cm. high, villous with 

 soft spreading or retrorse white hairs; leaves narrowly oblanceolate, acute or 

 acuminate, villous but green above, densely white villous beneath, 4-7 cm. 

 long; petioles villous; raceme densely flowered, 6-20 cm. long; bracts subulate, 

 hairy, quite persistent, longer than the buds; pedicels 1-4 mm. long; calyx 

 villous; corolla 8-12 mm. long; banner hairy; keel ciliate; pods densely villous. 

 Lake Coeur d'Alene, opposite Harrison, Idaho. 



Lupinus piperi Robinson. Silky and canescent, leafy at the base; root 

 single, perpendicular; stems 1 to 6, scapose, rather stout, simple, erect, curved- 

 ascending, or decumbent, covered with a loosely appressed pubescence; leaflets 

 5-8, oblanceolate, acute or acutish, about 3 cm. long; petioles 5 to 10 cm. long; 

 peduncles 7-13 cm. in length, equalling the showy rather loose racemes; 

 pedicels 3-4 mm. long, tomentose with widely spreading hairs; corolla deep 

 blue; the standard broad, entirely glabrous, paler toward the center; keel 

 ciliated; pods 20-24 mm. long, 4 or 5-seeded. Common in gravelly soil 

 about Spokane and Spangle. 



Lupinus hellerae Heller. Silvery canescent; stems several, clustered, 

 erect, 30-35 cm. high; leaves numerous, mostly basal; leaflets 7-9, oblong- 



11 



