130 MINNESOTA BOTANICAL STUDIES. 



Astragalus preussii A. Gray. Proc. Am. Acad. 6. 222. 

 1866 

 Tragacantha preussii OK. Rev. Gen. PI. 2:947. 1891. 

 Utah and Nevada. 



Astragalus preussii A. Gray. var. laxispicatus 7i. n 



A. preussii A. Gray, var. laxiflorus A. Gray. Proc. Am. Acad. 

 13:369. 1878. 

 Not ^4. Zaaji/^orws Boiss. Fl. Orient. 2: 413. 1872, 



a synonym of A. bracteosiis Boiss. and Noe. in Boiss. Diag. 

 II. 2 : 31. 1849, a species found in Anatolia. 

 Northern Arizona and California. 



Astragalus preussii A. Gray. var. arctus n. n. 



A. preussii A. Gray. var. latus Jones. Zoe. 4: 36. 1893. 

 Not A. latus Jones. Zoe. 4: 272. 1893, 



which is based on A. diphysiis A. Gray, var, Icdus Jones. Zoe. 

 3 : 287. 1893. This variety includes most of the Utah collec 

 tions of A. ijreussii A. Gray, recently reported. It is charac- 

 terized by the low habit, narrower and smaller leaves and 

 subulate pointed, cylindrical or oblong-ovate legumes. 



§ 6. Pectinatus. 

 Astragalus serenoi (OK.) 



Tragacantha serenoi OK. Rev. Gen. PL 2: 941. 1891. 

 ^4. nudus Wats. Bot. King Rep. 5: 74. 1871. 

 Not .4. nudus Clos. in C. Gay. FI. Chil. 2: 11-5. 1846. 

 a Chilean species. 



A. oblatus Sheld. Bull. Minn. Geol. and Nat. Hist. Surv. n. 9:19. 

 1894. 

 Nevada. 



Astragalus toanus Jones. Zoe. 3:296. 1893. 

 Nevada. 



Astragalus grayi Parry, in Wats. Am. Nat. 8:212. 

 1873. 



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

 Wyoming. 



Astragalus pectinatus Dougl. in G. Don. Gen. Syst. 

 Gard. and Bot. 2 : 257. 1832. 



Phaca pectinata Koon. Fl. Bor.-Am. 2: 149. 18.33. 

 Tragacantha pectinata OK. Rev. Gen. PL 2: 947. 1891. 



