i Bo i 
is 
ku t 五 第 
(3) 


Ecklonia radicosa. 



The present alga is collected on the coast of lyo and Tosa from March to June, and is sold as an article of food 
under the name of AntoFu. 
Mr. F. R. Kjellman’s Laminaria radicosa is, no doubt, the same as my plant. I would rather place it in the 
genus Ecklonia on account of the decidedly pinnate division of the frond. Mr. Kjellman also distinguishes two 
forms of the species; viz., f. elongata and f. latifolia. The frond of the latter is ovate, cordate or subreniform, 
and proportionally shorter and broader than that of the former. The latter is perhaps a form growing in shallow 
water. 
The present species differs widely in the character of the frond and the stipe from the three Japanese species 
of Ecklonia thus far known: , viz., &. dicyclis, Kjellm., £. cava, Kjellm., and £. latifolia, Kjellm., all of which are 
closely allied to each other, The young stage of all these three species is more or less like Laminaria in form, 
but not so much so as that of the present alga. Mr. Kjellman remarks that Lamunaria radicosa presents a con- 
necting form between the two groups Saccharing and Apod@ on account of the root-like appendages sent forth 
from the stipe and the base of the frond. It seems to me, however, that among our four species of Ecklonia, 
the present species is most closely allied to the genus Laminaria. 
