- 128 - 



Harv., }. Fig. 2 : growing point of frond, ^y 2 . Fig. 3 : outline of the 

 -cross-section of branch, -^*-. Fig. 4 : portion of the cross-section 



t 



Syi. Fig. 5 : tangential section of frond through the central axis and an 

 axial branch, i~. Fig. 6 : portion of the same, showing rhizoids and 

 the formation of cortical cell-filaments from axial cells, 3jp, 



Gymnogongrus flabelliformis Harv. 



Norn. Jap. " Okitsiinori. 

 PL. CLXXXI, Fig. 7-9 ; PL. CLXXXII, Fig. 9-14. 



t-iyinn. flab. Harv. in Gray's List of Jap. PI. p. 332 ; Sur. Alg. Jap. 

 p. 36, t. XXIV B., DeToni Phyc. Jap. nov. p. 25 ; Id. Syll. Alg. IV, 

 p. 248; Okam. Nippon Sorui Meii (2nd. ed.) p. 32; Id. Alg. Jap. 

 Exsic. Fasc. I, n. 10. Gymn. japonic/is Sur. Alg. Jap. p. 36, tab. 24r?. 



Promts caespitose, rising from callous disc, narrow-linear, compressed, 

 many times regularly dichotomo-flabellate, fastigiate, closely forking, with 

 segments erecto-patent standing on roundish axils, and attain the height 

 of 4-8 cm. Segments are usually linear and equally broact or a little 

 cuneate toward forks, 1-1.5 mm. in breadth, but sometimes become 

 very slender and almost filiform ; margin with or without proliferations 

 which are either simple or once or 2-3 times forked. Dichotomous 

 segments are usually near to each other, but in some widely separated. 

 Apex obtuse or pointed, sometimes slightly dilated and emarginated or 

 bifid, (lystocarps produced in ultimate and penultimate segments, often 

 3-4 seriated in one row, slightly prominent on both surfaces. Colour 

 vinoso-purple, becoming almost black in drying. Substance cartilaginous 

 and the plant does not adhere to paper in drying. 



Hab. : on rocks near high tide. Common along both coasts of 



