LEGUMINOSAE. 153 



in short racemes; bracts narrow, exceeding the pedicels; calyx-lobes subulate, 

 subequal, half the length of the tube; corolla 3-3.5 cm. long, pale yellowish, 

 the tip of the keel purple; pods ovoid, densely villous, stout beaked, curved, 

 about 2 cm. long. Gravelly soil about Spokane. 



Astragalus inflexus Dougl. Densely white-villous and tomentose through- 

 out; stems prostrate or decumbent, 10-30 cm. long; leaves short-petioled ; 

 leaflets 21-25, ovate, acuminate, short-stalked, about 1 cm. long; peduncles 

 shorter than the leaves; racemes rather densely few-flowered, the flowers 

 short-pedicelled; calyx-teeth awl-shaped, much shorter than the cylindric 

 tube; corolla violet, rarely yellowish, about 20 mm. long; pod villous, stout- 

 beaked, curved, 2-2.5 cm. long. Sandy bars of Snake River. 



Astragalus collinus Dougl. Erect, 30-50 cm. high, greenish, but with an 

 appressed pubescence throughout; leaves 5-10 cm. long; leaflets 5-10 pairs, 

 oblong-truncate or retuse, cuneate at base, short-stalked, about 1 cm. long, 

 smoother above; peduncles mostly terminal, longer than the leaves; flowers 

 yellow, reflexed, in racemes, 5-12 cm. long; calyx-tube oblong, campanulate, 

 gibbous at base, 1 cm. long, the teeth short, triangular, acute; corolla 12-15 

 mm. long; pods linear, acuminate, puberulent, 2-3 cm. long, 3 mm. wide, the 

 stipitate base as long as the calyx. On warm hillsides. 



Astragalus beckwithii T. & G. Glabrous or nearly so; stems ascending or 

 spreading, 20-40 cm. long; leaflets 7-11 pairs, oval to nearly orbicular, obtuse 

 or retuse, 5-10 mm. long, pale, thickish; peduncles about as long as the leaves; 

 flowers 5-8, in a short raceme, yellowish, 10-15 mm. long; calyx glabrous or 

 with a few black hairs, the subulate teeth about equalling the campanulate 

 tube; pods straight, 2.5-3 cm. long, glabrous, turgid, coriaceous, the dorsal 

 suture slightly intruded, the ventral prominent. Bluffs of Snake River, 

 near Lewiston, Idaho, Henderson, and along the Tukanon, Brandegee. 



Astragalus arthuri Jones. Erect or nearly so, 40-60 cm. high, pale green, 

 with a fine appressed pubescence, leafy only tov/ard the base; leaves oblong, 

 6-10 cm. long; leaflets 10-13 pairs, oblong, obtuse, 5-12 mm. long, glabrous 

 above, short-petioled; peduncles 10-20 cm. long, each bearing about ten 

 reflexed or spreading pods; pods slender, falcate, stipitate, 5-5.5 cm. long when 

 mature, 2 mm. broad, acuminate, puberulent, triangular in cross section, 

 the dorsal suture deeply intruded; flowers not seen. Craig Mountains near 

 Lake Waha, Idaho, and Blue Mountains near the mouth of the Grande Ronde 

 River. 



Astragalus arrectus Gray (A. palousensis Piper). Erect, 30-60 cm.' high, 

 sparsely appressed-pubescent throughout; leaves erect of ascending, 10-20 

 cm. long; leaflets about 15 pairs, oblong, somewhat truncate, cuneate at base, 

 puberulent on both sides, 1-2 cm. long; peduncles stout, much longer than the 

 leaves; flowers whitish, in rather dense erect racemes; calyx 5 mm. long, black- 

 pubescent, the tube campanulate, twice as long as the short acute teeth; 

 corolla 10-12 mm. long; pods linear, short-beaked, 12-16 mm. long, 5 mm. wide, 

 thinly puberulent, slightly roughened, the dorsal suture pressed inwards, the 

 stipitate base as long as the calyx. Grassy hillsides, not rare. 



Astragalus mortoni Nutt. Erect, 30-80 cm. high, minutely appressed- 

 pubescent, but green; leaves 10-15 cm. long; leaflets 7-10 pairs, ovate, oblong 

 or obovate, truncate or notched at the apex, rounded or cuneate at the base, 

 1.5-2.5 cm. long; peduncles as long as or longer than the leaves, stout; spikes 

 dense, 5-10 cm. long; flowers reflexed, but the fruit erect; calyx campanulate, 

 gibbous, 7-8 mm. long, the triangular acuminate teeth shorter than the tube; 

 corolla greenish, 12-15 mm. long; pods sessile, densely crowded, linear, 10-15 

 mm. long, 3-4 mm. thick, with a slender hooked beak. Open woods and 

 meadows. 



