Hypnea variabilis Okam. n. sp. 



Nom. Jap. : Tachi-ibara. 

 PL. LVI. 



Diagn. : Fronds erect, coespitose, not coalesced to each other, 

 with fibrous roots, compressed, often slightly channelled, subterete in 

 slender branches, virgately branched with ramifications between 

 pinnate and dichotomous, elongating upward into slender branches or 

 ending in thicker and bluntish apices, patent, rarely naked, usually 

 furinshed all around branches with non-constricted spinose ramuli which 

 here and there elongate into ordinary ones. Sori formed around the 

 middle and lower portions of ramuli. Cystocarps globular and 

 sessile. 



Hab. : Perhaps below the low water-wark. Owashi (Prov. 

 Kii), Shinoshima (Prov. Mikawa), Enoshima and Kamakura (Prov. 

 Sagami), Prov. Boshyii, Prov. Kadzusa, Yotsukura (Prov. Iwaki). 



Fruits : summer. 



Descrip. : Fronds coespitose, erect, not coalesced to each other, 

 often froming a roundish mass, standing with fibrous roots virgately 

 branched with the ramification between pinnate and dichotomous. In 

 some fronds, main-branches are more pinnate, in others more 

 dichotomous with thicker branches disposed in pinnate manner, and 

 still in others dichotomo-decompound. Thus, the from of irond is 

 very variable in appearence. Branches are patent and not constricted 

 at their origin, rarely naked, usually more or less furnished with teeth- 

 ike spines all around the sides, often in dense aggragations, which 



PL. LVI-LX. Aug., 1909. 



