Vol.. II.] 



PEA FAMILY. 



299 



7. Astragalus adsurgens Pall. As- 

 cending Milk Vetch. (Fig. 2131.) 



Astragalus adsurgens Pall. Astrag. 40. pl.Ji. 



1800. 



Minutely cinereous-pubescent or glabrate, 

 ascending or decumbent, 4 / -i8 / long, simple 

 or branched at the base. Stipules membran- 

 ous, ovate, acuminate, 3 // -5 // long; leaflets 

 *5~ 2 5, val to linear-oblong, obtuse and 

 sometimes emarginate at the apex, narrowed 

 at the base, 8 // -i2 // long; peduncles exceed- 

 ing the leaves; flowers purplish, 6 // -8 // long, 

 in dense short spikes; pod sessile, 2-celled, 

 oblong, pointed, coriaceous, finely pubes- 

 cent, erect, dehiscent, cordate-triangular in 

 section, deeply furrowed on the back, 4 // -6 // 

 long. 



Prairies, Minnesota to the Northwest Terri- 

 tory and British Columbia, south to Kansas and 

 Colorado. Also in northern Asia. June-July. 



8. Astragalus Hypoglottis I,. Purple 

 Milk Vetch or Cock' s-head. (Fig. 2132.) 



Astragalus Hypoglottis I,. Mant. 2: 274. 1771. 



Pubescent or glabrate, decumbent or ascending, 

 slender, branched at the base, 6 / -24 / long. Stipules 

 ovate-lanceolate, acute, 2 // -3 // long; leaflets 17-25, 

 oblong or elliptic, obtusish and generally emarginate 

 at the apex, rounded at the base, 3 // ~7 // long; 

 flowers violet-purple, 6 // -io // long, in dense heads; 

 pods membranous, sessile, 2-celled, dehiscent, 

 densely villous with white hairs, ovoid-oblong, 

 deeply furrowed on the back, 4 // ~5 // long. 



Kansas to Minnesota, north to Hudson Bay, west to 

 Nevada and Alaska. Also in northern Europe and 

 Asia. May-Aug. 



9. Astragalus Drummondii Dougl. 

 Drummond's Milk Vetch. (Fig. 2133.) 



Astragalus Drummondii Dougl.; Hook. Fl. Bor. 

 Am. i: 153. 1833. 



Loosely woolly-pubescent, erect, i-2 high, 

 rather stout, growing in clumps. Stipules ovate, 

 long-acuminate, 3 // ~5 // long; leaflets 19-33, ob- 

 long or sometimes oblanceolate, obtuse at the 

 apex, narrowed at the base, 5 // -io // long; flow- 

 ers yellowish white or the keel purplish tinged, 

 8"-9" long, in loose spikes; peduncles equalling 

 or exceeding the leaves; pod i-celled, the dorsal 

 suture somewhat intruded, distinctly stipitrte, 

 cartilaginous, linear, pendent, glabrous, grooved, 

 about 2' long; calyx somewhat enlarged at the 

 base, dark-pubescent above. 



Prairies, Nebraska to Manitoba, Wyoming and 

 the Northwest Territory. June-July. 



