152 



LEGUMINOSAE. 



Pods 2-celled, small, ovate, short- villous. A. spaldingii. 



Pods 1-celled, large, curved, soft-woolly. 



Flowers ochroleucous ; leaflets 13-17. A. purshii. 



Flowers violet; leaflets 21-25. A. inflexus. 



Herbage and pods either glabrous or short-canescent. 

 Pods stipitate, the stipe equalling or exceeding the 



calyx. 



Pods with both sutures prominent. A. collinus. 



Pods with the dorsal suture impressed or intruded. 

 Leaflets broadly oval, glabrous; pods oblong, 



thick. A. beckwilhii. 



Leaflets oblong to linear, pubescent at least 



beneath; pods linear. 



Pods slender, curved, the stipe much ex- 

 ceeding the calyx; leaflets puberulent on 

 both sides. A. arthiiri, 



Pods stout, straight, the stipe not exceeding 



the calyx; leaflets glabrous above. A. arrectus. 



Pods sessile or nearly so. 



Pods 2-celled by the intrusion of the sutures. 



Flowers greenish or yellowish; pods oblong. A. mortoni. 

 Flowers purple or purplish. 



Pods oblong; flowers spicate. A. adsurgens. 



Pods ovate ; flowers capitate. A . hypoglottis. 



Pods 1-celled. 



Flowers in racemes ; leaflets not rigid nor prickly- 

 pointed. A. reventus. 

 Flowers subsessile in the leaf axils; leaflets rigid, 



prickly-pointed. A. viridis. 



Astragalus lentiginosus Dougl. Slightly appressed puberulent but green; 

 stems spreading, 10-30 cm. long; stipules ovate, acuminate; leaflets 11-21, 

 obovate to oblong, obtuse or retuse, 6-12 mm. long; flowers purple; pods ovate, 

 curved, acuminate, not stipitate, perfectly 2-celled, puberulent. In moist 

 somewhat alkaline situations. Rare in our limits. 



Astragalus hpokerianus (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 shortly stipi- 

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

 splotches. High rocky ridges of the Blue Mountains, first collected by 

 Douglas. 



Astragalus spaldingii Gray. Densely white-villous throughout; stem erect 

 or decumbent, 30-50 cm. high; leaves 6-10 cm. long, short-petioled; leaflets 

 10-15 pairs, lanceolate, acute at each end, sessile, about 1 cm. long; peduncles 

 longer than the leaves; flowers in dense spikes, 2-6 cm. long; calyx densely 

 villous, the linear lobes as long as the campanulate tube; corolla white, the 

 keel purple-blotched, 7-8 mm. long; pod villous, ovoid, beaked, 1- or 2-seeded, 

 as long as the calyx, the dorsal suture slightly impressed. Not rare, on 

 hillsides. 



Astragalus purshii Dougl. Herbage densely white-villous; stems ascending 

 or spreading, 10-20 cm. long; leaflets 6-8 pairs, oblong, sessile, about 1 cm. 

 long; stipules lanceolate, acuminate; peduncles snorter than the leaves; flowers 



