176 



more than 0.5-1.5 mm thick, mostly branched pinnately in 

 paniculate outline. Branches and branchlets alternate or opposite, 

 here and there arising to 3 or more in almost verticillate manner, 

 patent or almost horizontal. Ramuli cylindrical or clavate, 

 truncated or almost round at apices, simple or longer ones again 

 branched beneath their apices, i-io mm long and 300-900 p thick, 

 often triparted. Tetraspores collected beneath a little thickened 

 apex of ramuli. Cystocarps oval, sessile, sitting along the side of 

 upper branches and branchlets, Colour dark purple, often fading 

 to greenish or yellowish. Substance soft cartilaginous when recent, 

 and the plant imperfectly adheres to paper in drying. 



Hab. : On rocks between tisde-marks often near high tide. 

 Common along the warmer part of the country. 



PL. CXCIII. Fig. 1-3 : different forms of Laurcncia obtnsa 

 (Huds.) Lamour. from different localities, -J-. Fig. 4-5 : portion 

 of branch, magd., ^, -f-, resp. F.g. 6 : cystocarp, ^. Fig. 7 : 

 tetrasporic branch, J-. Fig. 8 : tetrasporic branch magd., . 



Sporochnus radiciformis (R. Br.) C. Ag. 



Nom. Jap.: tauiakeyari. 



PL CXC1V. 



Sporochuus radiciformis (R. Br.) C. Ag.; J. Ag. Sp. Alg. I, p. 

 157; Kiitz. Sp. Alg. p. 568; Harv. Phyc. Austr. t. 225; De Toni 

 Syll. Alg. Ill, p. 382 ; Yendo Notes on Algae new to Jap. V, 

 p. 249. Fncus radiciformis R. Brown in Turn. Hist. Fuci t. 189. 



Plants now before us not fully grown. Root a small conical 

 disc covered with yellowish brown hairs. Frond erect with a 

 cylindrical percurrent stem, ca. 0.5 mm in diam., becoming 

 gradually narrower upward, 15-20 cm high, pinnately branched on 



