150 MINNESOTA BOTANICAL STUDIES. 



glabrous and transversely rugose-veined when old, unilocular, 

 but the ventral suture strongly introflexed so as to make the 

 cavity two-lobed, eight to ten seeded. 



Collected in the Utah valley, Utah, May, 1880, by M. E. 

 Jones; also west side of Johnston Pass, south fork of Hum- 

 boldt river and Great Desert, Utah, May, 1859, by Henry 

 Engelmann, and in gravelly bottoms, Gros Ventres fork, and 

 Jackson's Hole, valley of Snake river, Wyoming, June, 1860. 

 by F. v.. Hayden. 



This species is most nearly related to Astragalus vespertinus 

 Sheld., but the habit most nearly resembles that of Astragalus 

 amphioxys A. Gray. 



Astragalus vespertinus n. s^y. 



Perennial, sabcaespitose,white-appressed pubescent through- 

 out with appressed, dolabraform hairs: stems 4 to 6 cm. in 

 length, several from the branching base, decumbent or sub- 

 erect, striate; leaves 2 to 10 cm. in length, the rachis channeled; 

 leaflets 4 to 12 mm. in length, in five or six pairs, obovate- 

 oblong, obtuse; stipules deltoid-falcate, acute, erect, persistent, 

 sheathing below; peduncles 5 to 12 cm. in length, striate, loosely 

 subcapitately three to six flowered; flowers 2.5 to 3.5 cm. in 

 length, slender, loosely spreading; calyx cylindrical, pinkish 

 tinged, subtended by a large acuminate bract, the erect teeth 

 linear- acuminate, one fifth the length of the tube; corolla nar- 

 row, large, purplish tinged with magenta or green, the banner 

 prominently notched; legume 2.5 to 3 cm. in length, coriaceous, 

 oblong, pointed at both ends, obcompressed so as to become 

 nearly two-celled, minutely appressed pubescent, finely reticu- 

 lated, bilocular by the obcompression, the cavities with loose 

 membranaceous tissue, eight to ten seeded. 



Collected near Grand Junction, Colorado, May, 1892, by 

 Miss Alice Eastwood. 



This species has been referred to Astragalus amphioxys A. 

 Gray, which it resembles in habit. The legumes, however, 

 mark it as a distinct species intermediate between Astragalus 

 puhentissimus T. and G. and Astragalus pterocarpus Wats. 



§ 14. SCUTICARPUS. 



Astragalus pterocarpus Wats. Bot. King. Rep. 5:75. 

 1871. 



Tragacantha pterocarpa OK. llev. Gen. PI. 2: 947. 1891. 

 Nevada. 



