Gracilaria confervoides (L.) Grev. 



Norn, Jap. : Ogo-nori. 

 PL CL1. 



Gracilaria confervoides (L.) Grev. Alg. Brit. p. 123 ; Harv. Fhyc. Brit, 

 t. 65; J. Ag. Sp. Alg. II, p. 587, Epicr. p. 413; Thur. et Born. Etucle 

 Phyc. t. 40; Hauck Meeresalg. p. 182, f. 77; De Toni Syll. Alg. IV., p. 

 431. Fucus confervoides L. Turn. Hist. t. 84. Sphccrocoam confervoides 

 Ag. Kuetz. Tab. Phyc. XVIII., t. 72, and many other specis. ? Syn. Graci- 

 laria flexuosa Holmes New Mar. Alg. fr. Japan (Linn. Soc. Journ., Bot. 

 Vol. XXXI, 1895) p. 253. 



Fronds numerous rising from a small callous disk, filiform, 

 cylindrical, slightly flexuose, 5-20 cm. but sometimes extending to 

 60 cm. in length, usually less than i mm. in diameter or some- 

 times 1.5-2 mm., laterally branched, but very variable in length, 

 thickness and somewhat in ramification. Branches mostly elongated, 

 gradually tapering toward apex, beset with similarly shaped but 

 shorter ones of the second order which are loaded with mostly 

 simple, longer or shorter ramuli. Branches arise alternately on 

 all sides with mostly patent or erect axils, sometimes quite naked 

 and flagelliform or sometimes one-sideclly arising ; in some here and 

 there subdichotomous ramification is observed. Branches of every 

 order taper toward apex and slightly constricted at their bases. 

 Tctraspores densely scattered over surface of frond. Cystocarps 

 abundantly produced on all sides of branches, often aggregated, 

 hemispherical ; placenta elevated and not lobed. Antheridial holes 

 are densely formed over surface of frond. Frond internally consists 

 of larger, roundish, somewhat thick-walled cells. Colour purplish- 

 brown, greenish or yellowish becoming blackish in drying. Sub- 



PL. CL1CLV, January, 1916. 



