Sheldon: SPECIES OF astragalus. 119 



Ungulate, or linear-spatulate rachis, the margins of which are 

 involute; stipules large, sheathing, hyaline, truncate, ciliate; 

 peduncles slender, shorter than the leaves, one or two flowered; 

 flowers 10 mm. in length; calyx campanulate, glabrous, the 

 subulate-spreading rigid teeth one -half the length of the striate 

 tube; corolla probably ochroleucous or purplish, the color not 

 preserved in the type specimen; legume not mature, but show- 

 ing characters similar to other species of this section. — Col- 

 lected at the foot of Big Hornmts., Wyoming, August, 1859; 

 alsoonRedButteson North Platte river, Wyoming, May, 1860, 

 by Mr. F. V. Hayden on the expedition of Capt. W. P. Ray- 

 nolds, U. S. A., to the head waters of the Missouri and Yellow- 

 stone rivers, 1859-60. This species is most nearly related to 

 Astragalus spatulatus Sheld. and Astragalus simplicifolius 

 (NuTT.) A. Gray. The leaf and stipule characters will suffice 

 to distinguish it until specimens bearing mature legumes are 

 found. 



Type specimen in the herbarium of the Missouri Botanical 

 Garden. 



Astragalus spatulatus Sheld. Bull. Minn. Geol. and 

 Nat. Hist. Surv. n. 9: 19. 1894. 



Astragalus caespitosus A. Gray. Proc. Am. Acad. 6:230. 1866. 

 Homalobus caespitosus Nutt. Id T. & G. Fl. N. Am. 1: 352. 1838. 

 Tragacantha caespitosa OK. Rev. Gen. PI. 2:943. 1891. 

 Not Astragalus caespitosus Pall. Astrag. 70. 1890, 



which is a synonym of Oxytropis caespitosa Willd. Sp. PL 

 3 : 1304. 1803, occurring in Dahuria. 



Homalobus canescens Nutt. in T. & G. Fl. N. Am. 1:352. 1838. 

 'Not Astragalus canescens DC. Astrag. 114. 1802, 



an Armenian species. 



'Not Astragalus ca?iesce«s Soland. in Lowe, in Trans. Camb. Phil. 

 Soc. 4:34. 1831, 

 which is a synonym of Astragalus solandri Lowe, in Hook. 

 Kew. Journ. 8 : 294, 1856, a species occurring in Morocco and 

 Madeira. 



Homalobus brachycarpus Nutt. in T. & G. Fl. N. Am. 1 : 352. 1838. 

 ISot Astragalus brachycarpus BiEB. Fl. Taur. 2:201. 1809, 



wnich is the accepted name for a Caucasian plant. 



Kansas and Nebraska to Colorado, Wyoming, Montana and 

 British America. 



