252 



COMPARATIVE MORPHOLOGY OF FUNGI 



165, 2). In the second case, the sclerotia are indebted for their ability to 

 spread to structural changes in their own tissue; thus in C. Wilsoni on 

 Glyceria fluitans and in other aquatic and paludal forms (e.g., on Phrag- 



Fig. 166. — Isaria on Morpho pupa in Brazil. (Slightly enlarged; after Moller, 1901.) 



Fig. 167. — Isaria on pupa of hairy unknown species in Brazil. 



Moller, 1901.) 



(Slightly enlarged; after 



mites communis and Phalaris arundinacea) the sclerotia, in contrast to 

 those of the land plants, on account of enclosed air are able to float and 

 are thus enabled to reach a suitable spot. 



