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THE BOTANICAL MAGAZINE. 
[Wol。 WIE. January 20, 1894. 
S| _ On the structure of Cystoclonium armatum, Harv, 
ah By K, Okamura, 
Dr. W. H. Harvey describes this Japanese alga in Gray’s list of Jap. pl. p. 332. no. 19. with the 
following remark.:— 
“This has the habit of Gracilaria armata, and a structure of frond not very dissimilar, but the 
fruit is that of a Cystoclonium. There is no medullary stratum of filaments.” 
The plants I have studied will agree with Harvey's description in their external characters, and 
have cystocarps and tetraspores quite like those of Cystoclonium. My plants may be diagnosed as follows : 一 
Frond filiform, compressed, 10—25 cm. high, laterally much branched, 3—4 times decompound. Main 
stem mostly simple, 1,,—-2 mm. broad. Branches alternate or scattered, divaricately patent, long, subsimple, 
flexuous, tapering to a fine apex and constricted at the base. Branchlets, short, sublate, scattered 

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3, SELLE ELE TE PT IN ON TS eee 
~On the structure of Cystoclonium armatum, Harv. 
