DESCRIPTIVE MANUAL 



143 



Pennycress (T Idas pi arvense L,). 



Description. — An annual or winter annual with simple, smooth, 

 erect or branching stem ; leaves of stem clasping, with arrow-shaped 



%jth 



ft ^ I 



Fig. 81. Stinkweed or Field Pennycress (Thlaspi arvense). Grain and clover 



fields. 

 (.After Clark and Fletcher.) 



