452 BOTANICAL GAZETTE [JUNE 
The fungus referred to above as accompanying rootlets that had 
penetrated among the sporophylls presents stages that seem 
worthy of record. The mycelium is abundant and wide branching, 
and suggests that of a phycomycete, since no cross walls are 
apparent except in a few cases, and these cases might be only such 
Fic. 22 
Fic. 23 
Fics. 21-23.—Fig. 21, Swollen end of hypha, suggesting a young 
oogonium; 475; fig. 22, Hyphae showing two oogonia; X475; 
fig. 23, Photomicrograph of fertilized egg (?) of fungus; X141- 
Fic. 21 
as appear among phycomycetes. In many instances the hyphae 
bear what are evidently zygotes; and such stages as that shown in 
fig. 21 suggest the development of a sex organ. The situation 
represented in figs. 22 and 2 3 furthermore suggests that the fungus 
had oogonia and antheridia. However, it is fully realized, as sug- 
gested by Dr. HassELprinc, to whom our preparations were sub- 
mitted, that such data may be insufficient to determine the fungus 
with definiteness; it may be an oomycete; or it may not even be 
