ITS SUCKERS 121 



patch of dodder should be carefully raked 

 together and burnt, and by this process and 

 careful sifting its appearance in the fields can 

 generally be prevented. 



In the illustration (Fig. 35) part of the 

 enclosing stem of the dodder is seen with 

 three of its suckers inserted in the almost 

 circular section of the clover stem. In the 

 original photograph an amplitude of 80 dia- 

 meters is shown ; the focal distance was 40 

 inches; the exposure to gas was 5 minutes, 

 and the half -inch objective was used. The 

 section of the clover stem displays a beautiful 

 arrangement of cells. 



Looking again at the section, the outer 

 margin of the portion of dodder shown con- 

 sists of cellular tissue; next to that is the 

 woody cylinder. The three suckers of the 

 dodder are distinctly seen inserted in the 

 clover. With regard to the clover part of the 

 section, we see inside the margin about ten 

 nbro-vascular bundles ; all the remaining cells 

 towards and at the centre are loose cellular 

 tissue. 



