DESCRIPTIVE MANUAL 



393 



Fig. 229-A. Distribution of Annual Sow Thistle. 



Sow Thistle (Sonchus asper (L.) Hill). 

 Description. — Like the preceding species except that stem leaves 

 are less divided and*more spiny-toothed, with auricles of the 



Fig. 230. Sow Thistle (Sonchus asper). Waste places, yellow flowers and milky 



juice. 

 (Photographed by Colburn.) 



