70 Annals ok ihk Carnrgie Museum. 



MESADENIA Rafinesciue. 

 CACALIA Linnaeus. 



* M. reniformis ( Muhlenl^erg). (Ireat Indian plantain. 



* M. atriplicifolia (Linnaeus). Pale Indian jolantain. 



ERECHTITES Rafinesque. 

 -:'- E. hieracifolia (LinnKus). Fireweed. 



ARCTIUM Linnaus. 

 ■\ A. Lappa Linnixius. (jreat burdock. 



* A. minus .Schkuhr. Common Imrdock. 



CARDUUS Linnaius. 



C NIC US Tournefort. 



* C. lanceolatus Linnajus. Common thistle. 



* C. altissimus Linm^us. Roadside thistle. 



^= C. discolor (Muhlenberg). P^ield thistle. 



-^ C. odoratus (Muhlenberg). Pasture thistle. 



Fawn Township, roadside, Josiah Painter's place, July, 1895. 



^'- C. muticus (Michaux). Swamp thistle. 



Hampton Township, north of Wildwood Station, July, 1887, Dr. 

 Adolph Koenig ; August, 1890, J. A. S. 



* C. arvensis (Linnoeusj. Canada thistle. 



ONOPORDON Linnseus. 



* 0. Acanthium Linnseus. Cotton thistle. 



Pittsburg, W. Carson St., near city lines, July, 1889-98. 



