(2) 
= 8 W 
fe BPA ht 

Ecklonia radicosa. 
irregular, sometimes simple, sometimes pinnately lobulate, sometimes sub-bifurcate, undulate and crispate at the 
margin; the basal lobes reduced to short-toothed processes. Sori on both surfaces of the frond, at first distinct 
and roundish, at length more or less confluent into irregular patches. 
This alga grows along the southwest coasts of Japan, chiefly in the provinces of Tosa and Tyo in the island of 
Shikoku, According to Mr. Kjellman it is also found in the Goto Islands (Hizen) and at the Cape Nomo (Nagato). 
The root forms a mass 2-6 cm. in diameter. The stipe is short, flattened, somewhat convex on one side and 
concave on the other, usually 0°5-3 cm. long, sometimes 5 cm. long, a mm. broad and 1°5-2°5 mm. thick. The 
processes on the upper portion of the stipe are short, but those on the lower are longer and pass into root-fibres 
The frond when young has a close resemblance to that of Laminaria; but as it grows older, lateral lobes are 
gradually formed, which ultimately attain a length of 20 cm. or more and a breadth of 5 cm. or more, and the whole 
frond becomes irregularly pinnatifid. The lobes when young are oblong, entire, and rounded at the apex, but 
become when mature irregularly lobulate. The basal portion of the young frond is entire, but that of the old has 
marginal toothed processes; the lower lobes of the frond have also similar processes. The sori are formed not only 
in the median portion of the frond but also at the base of the lobes. The zoosporangia are linear and densely 
packed among cuneiform paranemata; they are 50-7044. long and 10/2. broad. 


