566 METASPERMAE OF THE MINNESOTA VALLEY. 



Prenanthes serpentaria Pursh, F1. Am. 499 (1814). 



? Nabalus glaucus Raf. F1. Lud. 57 (1817). 

 N. fraseri and trilobatus DC. Prodr. VII, 242 (1837-1839). 

 Wats, and Coult., Gray's Man. 6 ed. 301; Britt., Fl. N. J. 155; Mac, 

 Fl. Can. I, 282, 559; Upham, Fl. Minn. 90; Chap., Fl. S. St. 251; Gray, Syn. 

 Fl. I, 2, 434. 



North America: Newf., Anticosti, Q., Ont. to Minn.; 

 S. to N. Eng., N. J. and Pla. 



Minn, valley: Reported from N. E. and N. edges 

 borders of woods and thickets, or shady banks. 



Prenanthes alba Linn. Spec. (1753) 



P. rubicunda Willd. Spec. Ill, 2537 (1804). 

 P. suavis Salisb. Parad. Lond. 85 (1806-1807). 

 P. miamensis, ovata aniiproteophylla 'Ridb. Syn.W. PI. [I8'i5) in part. 

 Nabalus albus Hook. FI. Bor.-Am. II, 294 (1840). 

 Wats, and Coult., Gray's Man. 6 ed. 301; Britt., Fl. N. J. 155; Upham, 

 Fl. Minn. 90; Chap., Fl. S. St. 250; Mac, Fl. Can! I, 282, 559; Cov., Fl. 

 Ark. 199; Gray, Syn. Fl. I, 2, 434. 



North America: Newf., Anticosti to Saskatchewan; 

 S. to Ga., 111. and Ark. 



Minn, valley: Throughout; borders of thickets and 

 on shaded river banks. 



Herb. Sheldon 1156, New Ulm; Taylor 1094, Glen- 

 wood; Taylor 1121, Glenwood; Herrick 179, Minneapolis; Win 

 chell 11, Richfield; Herrick 180, Minneapolis; Bailey 481, Agate 

 bay; Bailey 399, Mud lake; Kassiibe 147, Minneapolis; Herrick 

 181 y Minneapolis; Sandberg 354, Cannon Falls; Herb. Sheld. 

 1812, Minneapolis. 



Prenanthes aspera Michx. Fl. N. Am. II, 84 (1803). 



P. illinoensis Pers. Syn. II, 366 (1807). 

 Chondrilla illinoensis PoiR. Suppl. II, 331 (1811). 

 Nabalus illinoensis DC. Prodr. VII, 242 (1837-1839). 

 N. asper T. and G. Fl. II, 483 (1841). 

 Wats, and Coult., Gray's Man. 6 ed.301; Upham, Fl. Minn. 90; Webb., 

 Fl. Neb. 143; Gray, Syn. Fl. I, 2, 433; Cov., Fl. Ark. 199. 



North America: Ohio to Minn. , Iowa, Neb. , Mo. and La. 

 Minn, valley: W. and N. W. districts; dry or sterile 

 fields and prairies. 



Herb.: Taylor 1064, Glenwood; Sheldon 1349,Yerdi, 

 Lincoln Co.; Sheldon 1325, Lake Benton; Sheldon 1437, Dakota 

 line, near Elkton; Sandberg 356, Cannon Falls. 



Prenanthes racemosa Michx. Fl. N. Am. II, 84 (1803), 



Nabalus rwxmosus DC. Prodr. VII, 242 (1837 18:«). 

 Wats, and Coult., Gray's Man. 6 ed. 301; Britt., Fl. N. J. 155; Upham, 

 Fl. Minn. 90; Mac, Fl. Can. 282. 559; Coult., Fl. Colo. 220; Gray, Syn. Fl. 

 I, 2, 433. 



