Postelsia 
to 
~I 
O 
of growth is very peculiar. It is a perennial 
and has a constriction in the lamina marking 
the end of each year’s growth, while I know of 
no reason for supposing that Renjfrewia par- 
vula is a perennial. Though this habit of 
growth may on closer study be considered of 
generic importance, it seems best for the present 
to consider this plant as Renjfrewia solidungula 
(j. G. Acardh): 
Laminaria yezzensis Miyabé (Rep. Marine 
Resources Hokkaido 3. On the Laminariacee 
and Laminaria Industries of Hokkaido, p. 41 
f. 12-13.) is a large plant (2.25 miullimetess) 
with an almost orbicular lamina digitately 
divided. It appears to be congeneric with my 
plant and should therefore be considered under 
the name Renjrewia yezzensis (Miyabé). 
The type specimen is deposited at the 
University of Minnesota, with cotypes in the 
collection of the author and the herbarium of 
the Ohio State University. Specimens will be 
distributed by Miss Tilden in her ‘*‘ American 
Alge.”’ 
5 
As a summary asynopsis of the species of 
