Flowering plants and ferns of Indiana. 1001 



C. Pitcheri (Torr.) Porter. 



(Cnicus Pitcheri Torrey.) 

 Found only in the sandy soils in the northern counties. One 

 of the prominent members of the upper beach flora. Not re- 

 ported inland. 



Flowers July and August. 

 Lake (Hill); Porter (Cowles). 



C. undulatus Nutt. Wavy-leaved Thistle. 



(Gnicus undulatus Gray.) 

 In northern part of State on plains and prairies. 

 Flowers from June until September. 

 Lake (Hill). 



C. odoratus (Muhl.) Porter. Pasture Thistle. 

 (Cnicus pumilus Torrey.) 

 Occurring sparingly in fields in a few counties. 

 Flowers in August and September. 

 Dearborn (Collins); Lake (Hill); Marion (Wilson). 



C. SPIN08I8SIMU8 Walt. Yellow Thistle. 



(Cnicus horridulus Pursh.) 

 Reported from a single station by Dr. MacDougal and speci- 

 men in DePauw herbarium. Evidently a migrant. No additional 

 record since original collection. 

 Putnam (MacDougal). 



C. muticus (Michx.) Pers. Swamp Thistle. 



(Cnicus muticus Pursh.) 

 In swamps and wet soils in many counties of the State. Much 

 more abundant in northern than in southern counties. 

 Flowers in August and September. 



Tippecanoe (Cunningham); Kosciusko (Coulter); Noble (Van 

 Gorder); Jay, Delaware, Randolph, and Wayne (Phinney); Vigo 

 (Blatchley); Lagrange (Barnes); Cedar Lake (Deam); Knox 

 (Spillman); Hamilton and Marion (Wilson); Steuben (Bradner). 



C. Arvensis (L.)Robs. Canada Thistle. 



(Cnicus arvensis Hoff.) 

 Found in fields and waste places in many parts of the State. 

 It is usually found in dry soil and not only maintains itself but 

 spreads rapidly. More abundant north. Easily recognized by its 

 small, compact head. 



