VOLUME XLI NUMBER 3 
BOTANICAL GAZETTE 
MARCH, 1906 
A MORPHOLOGICAL STUDY OF SARGASSUM FILI- 
PENDULA. 
CONTRIBUTIONS FROM THE HULL BOTANICAL LABORATORY. 
ETOILE B. SIMONS. 
(WITH PLATES X AND XI) 
THE family Fucaceae is less understood than its position and prom- 
inence in the Phaeophyceae warrant. Many important types have 
scarcely been considered at all, and, moreover, aside from the com- 
paratively recent cytological studies in the family, few investigations 
have been conducted with modern methods of technique. The prob- 
lems of morphology and cytology in the Fucaceae center chiefly around 
the sexual organs; the peculiar sunken structures in which they are 
borne, termed conceptacles; the likewise sunken but sterile structures 
called cryptostomata; and the sporelings. 
The present investigation of these structures in Sargassum filipen- 
dula Ag., a member of perhaps the most highly differentiated genus in 
the Fucaceae, was undertaken with the hope of filling some of the. 
obvious gaps in our knowledge of this family. It was conducted in 
the University of Chicago and at the Marine Biological Laboratory, 
Woods Hole, Massachusetts, under the direction of Professor BRADLEY 
Moore Davis, who suggested the research to me. It gives me pleasure 
to express here, both to him and to Professor JoHN MERLE COULTER, 
my appreciation of valuable suggestions and assistance given me in 
this work. My acknowledgments are also due the Carnegie Institu- 
tion for the use of a table at the Marine Biological Laboratory during 
the summer of 1904. 
References to anatomical and morphological work which concern 
161 
