FABACEAE. VOL. II. 



16. Astragalus eucosmos Robinson. Pretty 

 Milk Vetch. Fig. 2549. 



Phaca elegans Hook. Fl. Bor. Am, i : 144. 1830. 

 Astragalus oroboides var. americana A. Gray, Proc. Am. 



Acad. 6 : 205. 1864. 



Phaca parvi flora Nutt. ; T. & G. Fl. N. A. I : 348. 1838. 

 A. elegans Britton ; Britt. & Brown, 111. Fl. 2: 303. 1897. 



Not Bunge. 

 A. eucosmos Robinson, Rhodora 10: 33. 1908. 



Glabrous or nearly so, decumbent or nearly erect, 

 slender, somewhat branched, io'-2o' high. Stipules ovate, 

 acute, about 2" long ; flowers bluish or purple, 3"-4" 

 long, in elongated spike-like racemes ; leaflets 9-17, ob- 

 long or linear-oblong, 8"-io" long ; pedicels at length 

 i" long; pod sessile, ellipsoid, i-celled, pendent, slightly 

 inflated, obtuse at each end, apiculate, black-pubescent 

 all over, 2"-$" long. 



Labrador, Quebec and northern Maine ; Saskatchewan 

 to Yukon and Colorado. June-Aug. 



17. Astragalus aboriginorum Richards. 

 Indian Milk Vetch. Fig. 2550. 



Astragalus aboriginorum Richards. App. Frank. Journ. 



28. 1823. 



Phaca aborigina Hook. Fl. Bor. Am. i : 143. pi. 56. 1830. 

 Homalobus aboriginum Rydb. in Britton, Man. 554. 1901. 



Finely canescent or glabrate, erect, somewhat 

 branched, 8' -15' high. Stipules ovate, acute, mem- 

 branous or foliaceous, 2"-^" long; leaflets 9-13, 

 linear or oblong, obtuse or acute, 6"-io" long; flow- 

 ers white, tinged with violet, 4"-s" long, in rather 

 loose racemes ; peduncles longer than the leaves ; pod 

 slightly inflated, compressed, oval in section, i-celled, 

 glabrous, half-elliptic, long-stipitate, acute at each 

 end, slightly sulcate, the dorsal suture slightly in- 

 truded ; calyx blackish-pubescent, its teeth subulate. 



South Dakota to Manitoba, Alberta and Colorado. 

 Root long and yellow, " collected by the Cree and Stone 

 Indians in the spring as an article of food " (Richard- 

 son). May-June. 



18. Astragalus gracilis Nutt. Slender 

 Milk Vetch. Fig. 2551. 



Dalea parviflora Pursh, Fl. Am. Sept. 474. 1814. 



Not A. parviflorus Lam. 1783. 

 Astragalus gracilis Nutt. Gen. 2 : 100. 1818. 

 Astragalus microlobus A. Gray, Proc. Am. Acad. 6 : 



203. 1864. 

 Astragalus parviflorus MacM. Met. Minn. 325. 1892. 



Slender, erect, or ascending, finely pubescent, 

 i-2 high, simple or nearly so. Stipules ovate, 

 acute or acuminate, ii"-3" long; leaflets 7-21, 

 narrowly linear to linear-oblong, distant, obtuse, 

 truncate or emarginate at the apex, 4" 12" long, 

 scarcely i" wide; flowers purple, 3"~4" long, in 

 narrow elongated spike-like racemes ; pedicels i" 

 long or less; pods i-celled, sessile in the calyx, 

 pendent, straight, coriaceous, ellipsoid, finely a'p- 

 pressed-pubescent with white hairs, or at length 

 glabrous or nearly so, transversely veined, 2"-^" 

 long. 



Prairies and plains, Minnesota to Montana, Mis- 

 souri, Texas, Colorado and Wyoming. May-June. 



