Sheldon: species of astragalus. 159 



obovate oblong, obtuse or retuse, subcarnose; stipules counale 

 and membranaceous below, free, reflexed, obovate-acuminate 

 and persistent above; iieduncles 8 to 12 cm. -in length, striate, 

 smooth, subcapitately ten or twelve flowered; floioers 10 to 15 

 mm. in lengtn, spreading, becoming reflexed; calyx narrowly 

 campanulate, to cylindrical, slightly unequal at the base, the 

 spreading, filiform teeth one-fourth to one-third the length of 

 the tube; coroZto ochroleucous, slightly tinged with green; legume 

 2.5 to 3.5 cm. in length, including the stipe which is 6 to 7 mm. 

 in length, coriaceous, oblong, straight or very slightly curved, 

 glabrous, rarely mottled, very finely transversely veined, 

 bilocular by the intrusion of the ventral suture, trigonal or 

 flattened and sulcate dorsally, eight to twelve seeded. 



Collected near Durango, Colo., June, 1891, by Miss Alice 

 Eastwood, also on the Mesa Verde, southeast Colo., June. 1892, 

 by Miss Alice Eastwood; and at Grand Junction, Colo., June, 

 1893. by De Alton Saunders. 



This species is nearest to Astragalus drummondii DouGL., 

 and Astragalus scopulorum Porter and Coulter, but is 

 readily distinguished by the absence of pubescence. 



Astragalus (Irumrnondii Dougl. in Hook. Fl. Bor. Am. 

 1 : 153. 1833. 



Ti-agacantka drummondii OK. Rev. Gen. PI. 2:944. 189L 



Colorado, Wyoming and Montana; north to the Saskatchewan 

 and the Northwest Territory. 



§ 20. SUCCUMBENS. 



Astragalus succumbens Dougl. in Hook. Fl. Bor. Am. 



1:151. 1833. 

 * 

 Tragacantha succumbens OK. Rev. Gen. PI. 2:948. 1891. 

 Oregon. 



§ 21. ASCLEPIADODES. 



Astrasralus asclepiadoides Jones. Zoe. 2:239. 1891. 

 Utah and Colorado. 



§ 22. Eremiticus. 



Astragalus diphacus Wats. Proc. Am. Acad. 18:343. 

 1883. 

 Mexico. 



