




PLATE eX.4.— DoDDER ON ALFALFA. 
I, Dodder growing on potted alfalfa plant in greenhouse; some threads over three 
feet long. 2, Alfalfa branch bearing dodder threads which have survived the win- 
ter; cut April 21, 1906. 3, Dodder wintering on alfalfa crown; dug in March, 
1908. 
(I, One-sixth naturalsize; others natural size.) 
