\ 
PLATE XVII.— DoppEer, ALFALFA AND YELLOW TREFOIL, 

1, Alfalfa infested with dodder (Cuscuta epithymum) which is in bloom; 2, alfalfa 
seeds; 3, seeds of large-seeded dodder; 4, seeds of small-seeded dodder; 5, yel- 
low trefoil seeds. 
(All natural size.) 
