VOLUME XXIx NUMBER 5 
BOTANICAL C4gete 
MAY, rg00 
THE FERTILIZATION OF ALBUGO CANDIDA. 
CONTRIBUTIONS FROM THE HULL BOTANICAL LABORATORY. 
BRADLEY MOORE Davis, 
(WITH PLATE XXII) 
THE recent studies of Mr. Stevens (99) upon Albugo bit 
have yielded some exceedingly interesting results, which are 
very suggestive when considered and applied theoretically to 
a number of the Phycomycetes whose sexual processess are 
so little understood. Indeed, it is possible that the generally 
accepted views as to the homologies of sexual organs in certain 
members of this group may be materially changed with the 
newer standpoint. 
It was my privilege to follow the investigation of Mr. Stevens 
throughout its progress. Many questions arose for future inves- 
tigation to test the suggestive conditions presented by A/bugo 
blitt in other Phycomycetes. It seemed also desirable to re-ex- 
amine related species of Albugo, and Mr. Stevens very kindly 
8ave me his collections of the oft-studied A. candida, which 
furnished the material for this study. 
The results confirm the views of the earlier investigators, 
Wager (96) and Berlese (98), as to the behavior of the sexual 
nuclei. But a somewhat more detailed examination of a num- 
ber of points in the cytology of the oogonium will, I trust, war- 
rant the publication of this paper. The writer has also allowed 
297 
