166 MINNESOTA BOTANICAL STUDIES. 



Collected on the plains near Boulder, Colorado, H. N. Pat- 

 terson, July, 1892. This species has been referred to Astraga- 

 lus hypoglottis Linn., but the bushy habit and strigulose, dor- 

 sally concave legume are distinctive. 



§ 26. Uliginosus. 



Astragalus apertus n. n. 



A. ervoides H. and A. Bot. Beechey. 417. 1841. 

 Tragacantha ervodes OK. Rev. Gea. PI. 3:944. 1891. 

 Not A. ervoides TURCZ. in Bull. Soc. Nat. Mosc. 90. 1838. 



A. hookerianus Dietr. Syn. PI. 4: 1086. 1850. 

 Not A. hookerianus (T. and G.) A. Gray, Proc. Am. Acad. 6: 215. 



1866. 

 Mexico. 



Astragalus mortoni Nutt. Journ. Acad. Philad. 7 : 19. 

 1834. 



A. tristis Nutt in T. and G. Fl. 1: 336. 1838. 



A. spicatus Nutt. in T. and G. Fl. 1 : 336. 1838. 



A. canadensis L. var. mortoni Wats. Bot. King. Rep. 5:68. 



1871. 

 Iragacantha mortoni OK. Rev. Gen. Pi. 2: 946. 1891. 



Wyoming, Montana, Idaho and Washington; south to Utah 

 and Nevada. 



Asfragalus accideiis Wats. Proc. Am. Acad. 22: 471. 



1887. 

 Oregon. 



Astragalus carolinianiis Linn. Spec. 757. n. 9. 1753. 



A. canadensis Linn. 756. n. 10. 1753. 



Tragacantha canadensis OK. Rev. Gen. PI. 1:210. 1891. 



Quebec, Ontario, Hudson bay and Rocky mountains, to New 

 York, Georgia and Florida; west to the headwaters of the 

 Columbia river and the Saskatchewan; south in the mountains 

 to the Great Basin region; through Colorado, Minnesota, Ne- 

 braska, Kansas and Arkansas. 



§ 27. MOLLISSIMUS. 



Astragalus anisus Jones. Zoe. 4:34. 1893. 

 Colorado. 



