303] FI.ORA OF COLUMBIA AND VICINITY 161 



212. TEPHROSIA Pers. [CRACCA L.]. Goat's- 



RUE. 



539. T. Virginiana (L.) Pers. [C Virginiana L.]. Catgut. 

 Hoary pea. 



Dry open places; local. 



Southern New England and Ontario to Manitoba; Flor- 

 ida to Texas and Mexico. 



213. ROBINIA L. Locust tree. 



540. R. Pseudacacia L. Common locust. 

 Apparently native in a large flat southwest along Hinkson 



creek remote from all clearings; common along roadsides 

 and in yards. 



Pennsylvania to Iowa; Georgia to the Indian Territory: 

 range now much extended through cultivation. 



214. ASTRAGALUS L. \_GEOPRUMNON Rydb.: 

 HOLCOPHACOS Rydb.]. Milk vetch. 



541. A. Mexicanus A. DC. {G. Mexicatann (A. DC.) 

 Rydb.]. Ground plum. 



Hillsides and open thickets; frequent. 

 Illinois to South Dakota; Arkansas to Texas. 



542. A. Canadensis L. \^A. CaroUniamis L.]. Common milk 

 vetch. 



Hillsides and bottom lands; frequent. 

 Quebec to the Rocky Mountains; Georgia to Louisiana 

 and Colorado. 



543. A. distortus T. & G. \H. distortus (T. & G.) Rj^db.]. 



Bent milk vetch. 

 Summits of cliffs south of the waterworks dam and of 

 Hinkson creek east of the Black's Mill road; local. 

 West Virginia to Iowa; Mississippi to Texas. 



215. STYLOSANTHES Sw. Pencil flower. 



544. S. biflora (L.) B. S. P. [5. elatior Sw.]. 

 Common on barren hills. 



New York to Kansas; Florida to Texas. 



(II) 



