566 ~ METASPERMAE OF THE MINNESOTA VALLEY. 
Prenanthes serpentaria PursH, Fl. Am. 499 (1814). 
? Nabalus glaucus RAF. FI. Lud. 57 (1817). 
NV. frasert 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, F1. Minn. 90; Chap., F1.S. St. 251; Gray, Syn. 
FI. I, 2, 484. 
North America: Newf., Anticosti, Q., Ont. to Minn.; 
S. to N. Eng., N. J. and Fla. 
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. IIT, 2537 (1804). 
P. suavis SALISB. Parad. Lond. 85 (1806-1807). 
P. miamensis, ovata and proteophylla Ripp. Syn.W. Pl. (1835) 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. 8S. St. 250; Mac., Fl. Can. I, 282, 559; Cov., FI. 
Ark. 199; Gray, Syn. Fl. I, 2, 484. 
North America: Newf., Anticosti to Saskatchewan; 
S. to Ga., Ill. 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; Kassube 147, Minneapolis; Herrick 
181, Minneapolis; Sandberg 354, Cannon Falls; Herb. Sheld. 
1812, Minneapolis. 
Prenanthes aspera Micux. Fl. N. Am. II, 84 (1808). 
P. illinoensis Pers. Syn. II, 366 (1807). 
Chondrilla illinoensis Porn. 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, Verdi, 
Lincoln Co.; Sheldon 1325, Lake Benton; Sheldon 1437, Dakota 
line, near Elkton; Sandberg 356, Cannon Falls. 
Prenanthes racemosa Micux. Fl. N. Am. II, 84 (1803), 
Nabalus racemosus DC. Prodr. VII, 242 (1837-1839). 
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. 
