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PLATE XXVI. 



Lomentaria catenata Harv. 



RHODYMENIACE/E. 

 Nom» Jap. ： Fushi - tmnagL 



Lomentaria catenata Harv, in Gray i^ist of plants coll. in Japan, 

 p. 331 ； J. Ag. Epicr., p. 635 ； De Toni Phyc. Jap., (1895), p. 28, no. 60 ； 

 Id. Syll. Alg. Vol. Ill, p. 555 ； Okam. Al^. Jap. Exsic. Facs. I， no. 15.—— 

 Chylocladia catenata J. Ag. Epicr., p. 303 (nomen). 



Plant is dendritic, forminp* a larp-e, dense and roundish tuft, 

 and rises from matted surculus. Frond is stipitate, erect, cylin- 

 drical and tubular, 2-3 times pinnately branched and is 6-18 cm. 

 high, attaining 1-1.5 mm. in diameter. Stern is percurrent, slightly 

 narrowed at base, and is constricted into joints at various distances. 

 Branches of every order are opposite or verticillate, but not with- 

 out some irregularly inserted ones. The lower branches are 

 usually longer than the upper, and their lengths become shorter 

 and shorter upwards, and, as the consequence, the plant assumes 

 pyramidal outline. All the branches and branchlets are very 

 patent or almost horizontal, especially in lower branches, stand- 

 ing on rounded axils, and arise from neighborhood of node or 

 from internodes where segments widen out in some measures. 

 Their bases are somewhat narrowed and their apices are olunt. 

 Lengths of articulations are Ion ァ er in the lower portion of 

 stem and larger branches, becoming gradually shorter upwards- 

 Upper portions of branches are catenato-constricted with fusiform 

 or ellipsoidal segments, especially so in tetrasporic fronds. 



