90 TWELFTH ANNUAL REPORT. 



H. Canadense, Michx. Canada Hawkweed. 



Common, or frequent, throughout the state; abundant north of lake Superior, 

 Roberts. 



H. scabriim, Michx. Eough Hawkweed. 



St. Croix river. Parry; Saint Cloud, Camphell; Beaver Bay, Roberts; Pembina, 

 Chiclfering. (A hawkweed agreeing with Gray's description of this species in bearing 

 40- to 50-flowered heads, but In other characters like H. paniculatum, grows in the Red 

 river valley on moist prairie, Upham.) 



H. lougipilum, Ton-. Longr-bearded Hawkweed. 



St. Croix river, Parry; Blue Earth county, jLei?jerfir. Rare. South. 



H. veiiosiim , L. Rattlesnake- weed. 



Red river prairie, Dawson, Scott. Infrequent. 



PRENANTHES, Vaill. (Including Nabalus, Cass.) Rattle- 

 snake-boot. 



P. alba, L. White Lettuce. Rattlesnake-root. 

 Common throughout the state. 



P. serpentaria, Pursh.* (N. albus, Hook, var. serpentaria, Gray.) Rat- 

 tlesnake-root. 

 Hennepin county, Herrich; Stearns county, Camphell. [Devil's lake, Dakota, 

 Geyer.l 



P..altissima, L. Tall White Lettuce. 



Between lake Superior and the lake of the Woods, Macoun. 



P. racemosa, Michx. Rattlesnake-root. 

 Frequent, or common, throughout the state. 



P. aspera, Michx. Rattlesnake-root. 



Frequent through the south half of the state ; extending north to Stearns county, 

 Campbell, and Douglas county, Mrs. Terry. 



P. crepidinea, Michx. Rattlesnake-root. 



Lake Benton, Lincoln county, Upham. Infrequent. South. 



LYGODESMIA, Don. Lygodesmia. 



Li. juncea, Don. Lygodesmia. 



Common southwest ward, on sandy land; extending north and east to Muskoda, 

 Clay county, and Sand Hill river, Upham, Pembina, Havard, Meeker county, Camphell, 

 Minneapolis, Roberts, St. Croix river, Swezey, and Blue Earth county, Leihenj. 



[Crepis runcinata, Torr. &Gray, whose eastern limit extends from the Saskatchewaa 

 region to Nebraska and Iowa (Arthur), and the nearly related C. glauca,'Torr. & Gray, 

 of similar range, seem likely to be found in western Minnesota.] 



* Pbenanthks SERPENTARIA, Pursli. Commonly 2 feet high, glabrous or a little 

 hirsute-pubescent : stem sometimes purple-spotted, rather stout : leaves diversely 

 variable, assuming all the forms of the preceding species : inflorescence corymbosely 

 thyrsoid-paniculate ; the heads mostly glomerate at summit of ascending or spreading 

 flowering-branches or peduncles: involucre green, rarely purplish-tinged, 8- to 12- 

 flowered ; flowers purplish, greenish white or ochroleucous : pappus sordid straw- 

 color or whitish. . . . Open grounds, commonly in sandy or sterile soil. Gray's Synop. 

 lical Flora of N. A. 



