Sheldon: species of astragalus. 123 



Not A. tenellus Bunge. Syn. Astrag. Geront. 2:206. 1869.3 

 Western Minnesota to Montana, south to Kansas and Col- 

 orado, west to Utah, Nevada and southern California; north 

 from British Columbia and the Saskatchewan. 



Astragalus acerbiis n. sp. 



Perennial, minutely white-appressed pubescent throughout: 

 with a very bitter, tea-like taste; stems 3 to 3.5 dm. high, erect 

 spreading, diffuse branching, slender, numerous, growing in 

 clumps, finely striate below, becoming nearly terete above; 

 leaves 2.5 to 5 cm. in length, the rachis nearly terete or slightly 

 sulcate above, leajlleis 4 to 8 mm. in length, the odd terminal 

 one 1.5 to 2 cm. in length, in two or three pairs, linear, erect; 

 stipules triangular-ovate, very minute or absent above, larger 

 and sheathing below; pediincles 1 to 2 dm. in length, slender- 

 filiform, with five to fourteen scattered flowers; flowers 4 to 5 

 mm. in length, spreading, becoming reflexed; calyx campanu- 

 late, with short, triangular-acute teeth; corolla whitish, tinged 

 with bluish green; legume 10 to 12 mm. in length, including the 

 stipe which is shorter than the calyx, chartaceous, oblong, flat, 

 glabrous, not reticulated, becoming straw-colored, unilocular, 

 in the type maturing but one seed. 



Collected near Glenwood Springs, Colorado, June, 1893, by 

 Mr. DeAlton Saunders of the University of Nebraska. The 

 species is nearest to Astragalus tenellus Pursh. 



Astragalus inversus Jones. Zoe. 4 : 276. 1893. 

 California. 



Astragalus stenophyllus T. & G. PI. 1 : 329. 1838. 

 A. lejJtaphyllus Nutt. in Journ. Acad. Philad. 7: 18. ISSi. 

 Not A. leptaphyllus Desf. F1. Atlant. 2: 188. 1800, 

 an Algerian species. 



Tragacantha stenophylla OK. Rev. Gen. Pi, 2: 948. 1891 

 Montana. 



• 



Astragalus coltoni Jones, Zoe. 2:237. 1891. 

 Utah. 



3. The synonymy of this species becomes: 

 AHti'a8;aliiN kuiitKei n. d. 



A. tencUuK UuNGK. Syn. Astras. Gerout. SS: 206. 1869. 

 NotAAoiellmPuKSH. Fl. Amer. Sept. «: 473. 1814. 



Tramcantha hehmgai OK. Rev. Gen. PI. It : 940. 1891. 

 Not A. helanaerianuH Fisch. in Bull. Soc. Nat. Mosc.584: 484. 1853, 

 a synonym of A, leiocUidos Boiss. Dias. i. 5S : 62. 1843, a Persian species. 



