143 



Odonthalia corymbifera (Gmel.) J. Ag. 



Nom, Jap. : Hake-saki-nokogiri-hiba. 

 PL. XCI. 



Odonlhalia corymbifera (Gmel.) J. Ag. Sp. Alg. II, 3, p. 894; 

 De Toni Syll. Alg. IV, p. 1 1 36 ; ffi #, H * & It p. 66 Fncns 

 corymbiferus Gmel. Hist. Fucor. p. 124. Atomaria corymbifera 

 Rupr. Alg. Ochot. p. 21. Qdonthatia Gmclini Post, et Rupr. Illustr. 

 p. 14, Tab. XXVIII ; Kiitz. Sp. Alg. p. 847. 



Many fronds standing from a common scutate disc. Fronds 25 

 cm. high, ancipito-compressed near the base, more flat above, 1-2.5 

 mm. broad at the base, with an indistinct midrib, often attaining 4-5 

 mm. in breadth upward, decompound pinnate in an alternate manner, 

 and along both margins more or less densely fimbriated with minute 

 pinnae standing near to each other. Branches attenuated at the base, 

 patent with roundish axils, subcunea'to-linear, flabellato-incised at 

 apices with incurved laciniae. Ultimate branchlets dentiform or 

 much subulate. In the cross-section the axial cell is scarcely discern- 

 ible and cells of the cortical layer are thickly formed which are 

 somewhat loosely set. In the longitudinal section there is found a 

 fine axis consisting of slender elongated cells from which four short 

 pericentral cells (only two in view) arise near the upper node; from the 

 latter cells cortical cells are formed by further divisions. In the upper 

 thinner part of the frond, an evanescent midrib is faintly visible. 

 Fruits are formed in marginal fimbriate pinnae which are ciliary 

 and densely aggregated branching in a subcorymbose manner. Stichi- 

 dia are transformed from the pinnulae, fasciculated on a short rachis ; 

 they are very short, scarcely 2 mm. long and about 3 times as long 

 . PL. XCI XCV, Sept., 19127" 



