128 MINNESOTA BOTANICAL STUDIES. 



Astragalus fendleri A. Gray. PI. Wright. 2:44. 1853. 



Phacafendleri A. Gray. PI. Fendl. 36. 1840. 

 Tragacantha fendleri OK. Rev. Gen. PI. 2:944. 1891. 



Colorado and New Mexico. 



Astragalus gracilentus A. Gray. Proc. Am. Acad. 6: 



223; 1866. 



Phaca gracilenta A. Gray. PI. Fendl. 36. 1849. 

 Tragacantha gracilenta OK. Rev. Gen. PL 2:945. 1891. 



New Mexico. 



Astragalus albatus n. sp. 



Annual or perhaps biennial, whitened throughout with a 

 fine, dense pubescence; stems 9 to 20 cm. high, erect, simple, 

 thick, one to four from the yellowish root, finely striate; leaves 

 4 to 6 cm. in length, the rachis striate; leaflets 8 to 15 mm. in 

 length, in four or five pairs, oblong, obtuse; stipules triangular 

 acuminate, free, erect; peduncles 3 to 5 cm. in length, terete, 

 loosely four to six flowered; iioivers 5 to 6 mm. in length, erect- 

 spreading, becoming deflexed; calyx broadly campanulate, the 

 abruptly pointed triangular teeth one-third to one-half the 

 length of the tube; coroZZa whitish or ochroleucous; legume 11 to 

 12 mm. in length, membranceous-inflated, ovate-oblong, acumi- 

 nate pointed, the ventral suture straight, the dorsal curved, 

 softly white-pubescent, unilocular, with neither suture intro- 

 flexed, two to six seeded. 



Collected on the Colorado desert in southeastern California, 

 Ap. 1889, by C. R. Orcutt. The species near to Astragalus 

 sonorae A. Gray, and Astragalus vaseyi Wats. 



Astragalus sonorae A. Gray. PI. Wr. 2 : 44. 1853. 



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

 Arizona. 



Astragalus coriaceus Hemsl. Biol. Centr. Am. Bot. 1 : 



263. 1879. 



Tragacantha coriacea OK. Rev. Gen. PI. 2: 944. 1891. 

 Mexico. 



Astragalus anloninus Wats. Proc. Am. Acad. 17 : 343. 



1882. 



Mexico. 



