122 DISEASES OF FIELD & GARDEN CROPS. [CH. 



outer cells, seen at A, 011 the contrary, are somewhat like 

 the pallisade cells found on the upper surface of ordinary 

 leaves. In the centre of the dodder threads there is a 

 woody cylinder, as at B, surrounded by colourless, some- 

 what loose, cellular tissue, C. The suckers, D, proceed from 



X-15 



FIG. 53. 



Fragment of Clover stem with Dodder entwined to show the connection 

 Toy the suckers of Dodder. Enlarged 15 diameters. 



the central woody portion of the threadlike stem, and are 

 surrounded by a wall of colourless cells. The suckers of 

 Cuscuta Trifolii, Bab., are pushed into the fine longitudi- 

 nal furrows EE (which are always present in clover stems), 



