LEGUMINOSAE. 227 



long; leaflets 5-7, obovate or oblong-obovate ; flowers in umbels; calyx-teeth 

 as long as the tube; standard yellow, the wings and keel rose-colored; pod short. 

 In moist soil, near the seacoast, infrequent. 



298. OXYTROPIS. 



Low tufted perennials with very short stems and a thick root 

 or rootstock; leaves pinnate, of many leaflets; flowers in a head 

 or short spike on a scape-like peduncle; keel tipped with a sharp 

 point or appendage; otherwise similar to Astragalus; pod often 

 more or less 2-celled by the intrusion of the ventral suture. 



Leaflets 6-8 mm. long, crowded, densely appressed canescent on 



both sides. 0. luteolus. 



Leaflets 8-12 mm. long, not crowded, thinly appressed canes- 

 cent becoming glabrate above. 0. cusickii. 



Oxytropis luteolus (Greene) Piper n. comb. (Aragallus luteolus Greene.) 

 Loosely appressed canescent; leaflets close together, in 8-12 pairs, elliptic- 

 lanceolate, acutish, 4—6 mm. long; stipules scarious, ovate, acute; flowering 

 stems 10-20 cm. high, erect, bearing spikes 1-3 cm. long; bracts oval, half as 

 long as the calyx; corolla short-cylindric, canescent or with a few black hairs 

 intermixed; corolla pale yellow, IS mm. long. 



Olympic Mountains, head of Elwha River, Elmer. 



Oxytropis cusickii Greenman. Loosely appressed villous; leaflets in 8-15 

 pairs, oblong-lanceolate, acute, 7-15 mm. long; stipules scarious, ciliate; 

 scapes exceeding the leaves, 10-20 cm. high; spike dense, 2-5 cm. long; bracts 

 lanceolate, obtusish, half as long as the calyx; flowers nearly sessile; calyx 

 cylindric, appressed pubescent with white hairs intermixed with black ones; 

 corolla whitish, 12-15 mm. long; pods cylindric, 1-1.5 cm. long, 2-celled. 



In the Olympic, Cascade and Blue Mountains, rare. 



299. ASTRAGALUS. 



Chiefly perennial herbs; leaves odd-pinnate, with stipules; 

 flowers in spikes or racemes; calyx with 5 nearly equal teeth; 

 corolla and its slender-clawed petals usually narrow, spreading, 

 equalling or exceeding the wings and blunt keel; stamens 

 diadelphous; anthers all alike; ovary sessile or stipitate; ovules 

 numerous; pod sometimes inflated, 1-celled, or 2-celled by a false 

 partition; seeds few or many. 



Astragalus hookerianus (T. & G.) Gray. Herbage pale, silky or villous 

 with a fine whitish pubescence; stems ascending, 10-30 cm. long, usually 

 much branched at base; leaflets 7-9 pairs, oblong, petiolulate, 4-6 mm. long; 

 stipules lanceolate, the lower ones sheathing; peduncles shorter than the 

 leaves, the racemes few-flowered ; bracts setaceous, about as long as the pedicels ; 

 calyx pubescent with black and white hairs, the teeth subulate, shorter than 

 the tube; corolla whitish, the tip of the keel purple tinged; pods short-stipi- 

 tate, much inflated, thin, ovoid, 1-3 cm. long, pale, mottled with purple 

 splotches. 



Olympic Mountains, Elmer. 



