FLOWERING PLANTS AND PERNS OF INDIANA. 955 



N. alf.us (L.) Hook. Rattlesnake Root. White Lettuce. 



(Prenanthes alba L.) 



Difficult to separate from the preceding, both specie- being 

 very variable and intergrading. In woods and thickets in many 

 parts of the State. 



Flowers from August through September. 



Tippecanoe (Cunningham); Kosciusko (Coulter); Jefferson 

 (Barnes); Jay, Delaware, Randolph, and Wayne (Phinney); Noble 

 (Van Gorder); Clark (Baird and Taylor); Marion; Monroe; Steu- 

 ben (Bradner). 



N. asper (Michx.) T. and G. Rough White Lettuce. 

 (Prenanthes asper a Michx.) 

 Reported chiefly from the southern counties, where it occurs in 

 dry, open places. Not abundant in any station. 

 Flowers from August through September. 

 Clark (Baird and Taylor); Jefferson (J. M. Coulter); Steuben 

 (Bradner). 



N. kacemosus (Michx.) DC. Glaucous White Lettuce. 

 (Prenauthes racemosa Michx.) 

 Reported only from the northern part of the State, not being 

 reported as occurring south of Cass County. Rather abundant in 

 stations in which it occurs, which are usually moist, open places. 

 Flowering in August and September. 



Cass (Hessler); Noble (Van Gorder); Lake (Hill); Wabash 

 (Jenkins); Steuben (Bradner). 



N. crepjdineus (Michx.) DC. Corymbed Rattlesnake Root. 

 (Prenanthes crepidinea Michx.) 



Not uncommon in widely separated counties, usually growing 

 in fields and thickets in rather dry localities. It is absent from 

 the extreme northern counties, and is found most plentifully 

 in its southern stations. 



Flowers later than the other members of the genus, rarely be- 

 fore September, and continuing through October. 



Clark (Baird and Taylor); Franklin (Mcyncke); Jefferson (J. 

 M. Coulter); Tippecanoe (Conner and Laben); Fayette (Hessler): 

 Wabash (Jenkins). 



