PLASMODIOPHORACEAE 



127 



seeing the hatching of a zoospore, though many small 

 monads were present. 



Sorosphaera Veronicae. This parasite has been de- 



11 



FIG. 35. SOROSPHAERA VERONICAE. 1, A tumour on a Veronica plant ; 

 2, plant-cell with nucleus and starch grains in protoplasm ; 3, multi- 

 nucleate parasite in host-cell, in which are no starch grains ; 4, two 

 trophonuclei with surrounding plasmodioplasm ; 5, prophase of 

 trophonuclei ; 6, akaryote stage ; 7, new nuclei forming from akaryote 

 state ; 8, metaphase of reproductive nuclei ; 9, plasmodium separating 

 into nucleated subdivisions, one nucleus at metaphase ; 10, the 

 second simultaneous division of reproductive nuclei ; 11, spores formed ; 

 12, spores arranged in spherical sorus. 1, nat. size, after Blomfield 

 and Schwartz ; the rest X 1000 and drawn from a preparation by 

 Blomfield and Schwartz. 



scribed by Blomfield and Schwartz. The host-plant shows 

 tumours in various parts, Fig. 35, 7, on stems, petioles, and 



