Sheldon: SPECIES of astragalus. 171 



incurved with a long, acuminate incurved tip, both sutures 

 intruded so as to form a nearly bilocular cavity which is lined 

 throughout with fine cobwebby hairs, becoming smooth, eight 

 to ten seeded. 



Collected near Frisco. Utah, June, 1880, by M. E. Jones; 

 also at Muddy station, John Day valley, Oregon, May, 1885, by 

 Thomas Howell. 



This species is related to Astragdlus diphysus A. Gray, but 

 the resemblance is rather to Asfrar/alus beckwithii Torr. It 

 may be taken as a good example of the impossibility of sepa- 

 rating the species on the invariability of the one or two celled 

 legume. 



Astragalus diphysus A. Gray. PI. Fendl. 34. 1849. 

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

 New Mexico, Colorado and Utah. 



§ 30. Carnosocarpus. 



Astragalus teunesseensis A. Gray in Chapm. F1. S Sts. 



98. 1860. 



A. platlensis Nutt. var. teunesseensis A. Gray. Proc. Am. Acad. 

 6:193. 1866. 



Illinois to Tennessee and Alabama. 



Astragalus plattensis Nutt. in T. and G. Fl. 1 : 332. 



1838. 



A. caryocarpics ToRU. in Ann. Lye N. Y. H: 179. 1828. 

 Not ^. caryocarpus Ker. Bot. Reg. 2:176. 1816. 

 A. mexicanus A. Gray. PI. Lindh! 176. 1845. 

 IVagacantha plattensis OK. Rev. Gen. PI. 2: 947. 1891. 



Minnesota to Indiana and northern Alabama; w^est to Kansas. 

 Nebraska, Colorado and Texas. 



Astragalus mexicanus A. DC. PI. Rar. Gen. 4 : 16. 1827. 



.1. trichocalyx Nutt. in T. and G. Fl. 1: 322. 1838. 

 Not A. trichocalyx Trauty. in Act. Hort. Petrop. 4: 362. 1876.' ' 

 Tragacantha mexicana OK. Rev. Gen. PI. 2:946. 1871. 



Colorado to Missouri and eastern Illinois; south to Texas 

 and New Mexico. 



14. This species may HOW be Uoslj;u;itucl iis; .VslruKUlus |n'tro|»olitaiiiiis n. »i. 



