56 BOTANICAL GAZETTE 
two small sporangia from the zoospores of a temporary sporan- 
gium is shown in figs. 10-15. 
In a few cases, about three weeks after the first infection by 
the zoospores, there were also found mature resting sporangia 
similar to those found in the old leaves in the autumn (fg. 46 
In one case the first sign of these was seen about two weeks 
after the first infection. 
The development of the resting sporangia is quite similar 
to that described by Biisgen for Cladochytrium Butomi. Th 
zoospores penetrate into the leaf much as they do for the forma- 
tion of temporary sporangia, but in this case all of the conten 
any forms the Sammelzellen of authors ( fig. 25). After 
across the smaller basal end die end connected with the pet 
trating zoospore), which is less rich in oil globules than 
larger apical or free end. This latter cell may also be 
divided into two or more, apparently sometimes temporary 
partments. From this apical cell or cells are developed | ) 
this basal cell (disteh this was not ; surely made out) and 0 T 
or less embraced by the rhizoid-like process, there ios 
small round cell that rapidly enlarges into the spora 
while the basal cell becomes empty of its contents (figs. 
One or more of the mycelial threads may penetrate into ¢ 
cell, and there give rise to a similar apparatus ( figs. 25- 
this way the fungus spreads from cell to cell. About th 
the apical portion of the Sammelzellen becomes more 6 
collapsed ( fig. 20) but whether this is due to the produ 
the d from it, or toa p 
2 fertilization, as claimed by some botanists, was not dete 
_ On the side of She $e oung there is slag 
