Hypoglossum geminatum Okam. sp. nov. 



Norn. Jap. : Beniha-mri. 

 , . PL. XXXII, Fig. 7-12. 



Diagn, : Frond minute, repenting, slender. linear-lanceolate, with 

 corticated midrib, veinless, repeatedly branching in geminate manner by 

 proliferating similar segments from the midrib unifariously. Margin entire 

 or fimbriated in older portion. Cystocarps sessile, sitting on the midrib, 

 urceolate with a wide ostiole. 



Hob. : On the fronds of larger algae between tide-marks. Enoshima 

 , in Prov. Sagami ； Misaki (Prov. Sagami, Yendo). Fruit : — Spring. 



Dtscr, : Only a few small but fully grown specimens have been 

 found growin^5 on other algae. Primary frond prostrates and creeps over 

 other algae by the formation of attachments at several places. From this 

 there rise several branches on the upper surface of frond by proliferating 

 linear-lanceolate segments from both sides of the midrib in geminate 

 manner. They give rise to those of the next order in 

 the similar way and the plant attains the length of き》 



^5 難 



scarcely 2 cm. Branches of every order as weil as the —― 

 primary frond are linear-lanceolate, about 1 mm. broad, 

 miaribcd and furnished with a thin membrane which is Hypoglossum 



. , geniinatum Okam. 



destitute of veins ； they attach themselves to substratum by &卩 ^ ^。も, i 

 disc-shaped attachments from the midrib as shown in fig. へ 1-t よの "J 

 8 and 9, and also marginal hair-like root fibres are here and there produced 

 The miarib is more or ！ ess thickly corticated and opaque in lower portion 

 of frond, while in the upper it is almost translucent though not without cor- 

 tications. Margin is entire, but in older portions of frond linear transverse 

 rows of cells near the margin elongate beyond the general outline after the 



