CATALOGUE OP PLANTS. 155 



LACTUCA L. Lkttuck. 



1208. L. Canadensis L. Wild Lettuce. 

 Common in rich soil. July-Sept. 



1209. L. hirsuta Muhl. 



Dry soil; scarce. Mid-Juiie-Se[»t. 



Bluffs along Hogadone Road, near Hogadone Creek. 



1210. L. leucophaea Gray. 



X. Hpii'dtd (Lam.) Hitch. 

 Common in moist soil. Aug.-Sept. 



1211. L. ScARioLA L. Prickly Lettuce. 

 Waste places; frequent. Mid-July-Aug. 



It first appeared in this country on a dumping-ground of an At- 

 lantic seaport. In three years it had reached Michigan, and in 

 eight years, the Pacific coast. 



LEPACHYS Raf. 



liatihJda Uaf. 



1212. L. pinnata Torr. &, Gray. 



Dry soil, especially along streams; occasional. Mid-July-Aug. 

 Thornapple River; Rouge River; Grand River. Abundant at 

 these stations. 



LIATRIS Schreb. Button^ Snakekoot. Blazixg-Stak. 

 Larimirid Hill. 



1213. L. cylindracea Michx. 



Sterile soil; well distributed, but scattered. Aug. 



1214. L. scariosa Willd. Blazing-Star. 

 Dry soil: common. Aug. 



12i:). L. spicata Willd. 



Marshy ground; frequent. Aug. 



ONOPORDON L. Cotton or Scotch Thistle. 

 12 It). O. Acanthium L. 



Sterile soil of old fields; not abundant. June-Sept. 



Collected in the south part of the City in 1872 (Prof. C.F. 



Wheeler); fields at the corner of Lake Ave. and Packard St., 



