118 MINNESOTA BOTANICAL STUDIES. 



Phaca caespitosa 'SvTT. Gen. 2: 98. 1818. 

 Not Astragalus caespitosus Pall. Astrag. 70. 1800, 

 a synonym of Oxytropis caepitosa Pers. Syn. PI. 2 : 333. 1807, 

 an Oriental species. 



Phaca argophylla Nutt. in T. and G. Fl. 1 : 343. 1838. 

 Not Astragalus argophyllus Nutt. in T. and G. Fl. N. Am. 1: 331. 1838, 

 a synonym of Astragalus glareosus Dougl. in Hook. Fl. Bor. 

 Am. 1 :152. 1833, a native of the Columbia river valley. 



Kansas and Nebraska to Colorado, Wyoming, Montana, 

 North and South Dakota and the Saskatchewan, thence west to 

 the Rocky mts. 



§ 3. HOMALOBUS. 



Astragalus viridis (Nutt.) 



Kentrophyta viridis Nutt. in T. & G. Fl. 1 : 353. 1838. 

 Not A. viridis BvNGB. Astrag. Sp. Geront. 2: 231. 1869.i 



A. kentrophyta A. Gkay. Proc. Acad. Philad. ii. 7: 60. 1863. 



Kentrophyta montana Nutt. in T. & G. Fl. I: 353. 



Tragacantha montana OK. Rev. Gen. PI. 2:941. 1891. 

 Not A. montanus Linn. Spec. 760. 1753. 



New Mexico, Colorado. Utah, Nevada, Kansas, Nebraska, 

 South Dakota, Wyoming, Montana and British America. 



Astragalus viridis (Nutt.) Sheld. var. impensus n. n. 



A. kentrophyta A. Gray, var. elatus Wats. Bot. King. Rep. 5: 

 77. 1871. 

 Not A. elatus Boiss & Bal. Diog. ir. 9: 45. 1849, 

 a species foun,d in Cajjpadocia. 

 New Mexico and Nevada. 



Astragalus simplicifolius (Nutt.) A. Gray. Proc. Am. 

 Acad. 6 : 231. 1866. 



Phaca simpliafolia Nui^. in T. & G. Fl. 1 : 350. 1838. 

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

 Colorad5 and Utah. 



Astragalus lingulatus n. sp. 



Perennial, caespitose, minutely short pubescent becoming 

 glabrate, each plant growing in the form of a cl ose, compact, 

 semi-globose bunch; stems very short, branching, almost com- 

 pletely hidden by the abundant leaves and large stipules; 

 leaves 2 to 3.5 cm. in length, numerous, reduced to a narrowly- 



1. This species haviag as a synoaym'only A. nltens Buhse. in Nouv. Mem. Soc. Nat. 

 Mosc. 1!4:61. 1860. which is preoccupied by A. niteiis Boiss & Heldr. Diog ii. 9:51, 

 1849, may now take the naiae Astragalus praesignis n. n. 



