﻿PLATE II. 



Gelidium divaricatum Martens. 



GELIDIACE/E. 



NOM, JAP. Hime-tengusa. 



Gelidium divaricatum Martens Preus. Exped. n. Ost.-Asien, p. 30, 

 Taf. VIII, Fig. 4.— De Toni Syll. Alg., Vol. IV, p. 159.— Okam. Alg." 

 Jap. Exsic, Fasc. I, no. 4. 



Fronds dwarf, densely coespitose in pulvinate manner, ex- 

 panding in wide patches, erect, neither creeping nor furnished 

 with repenting portion, attaining the height of 1 — 1.5 cm. Fronds 

 are compressed or almost cylindrical and divaricately branch in 

 some main segments which are furnished with once or twice 

 pinnated branchlets. Branchlets are of unequal lengths, alternate 

 or opposite, not strictly distichous, but irregularly inserted on 

 all sides, very patent, and terminate in blunt or acute apices. 

 Fruits of both kinds are formed in swollen apices of branchlets. 

 Telraspores form a dense roundish sorus. Cystocarps are glo- 

 bular, blunt or slightly notched at the apex. Colour brownish red, 

 turning to blackish when dried. Substance ^cartilaginous and the 

 plant does not adhere to paper in drying. 



Hab. On rocks near high tide ； Hiuga, Tosa, Ise, Idzu, 

 Sap-ami, Boshu, Rikuzen. Tschifu (China). 

 Hither toknown •• Hongkong (Martens). 



This plant may be placed under the subgenus Acrocarptis 

 in the vicinity of Gelidium ptisillum. 



