rili: IM'CACK.F, OF JAPAN'. 65 



Syll. Al^^ ill. p. !!).—/(/.: Pliyc. Jap. Nov. p. 4r5.— TTaiuot : A1-. .le 

 Yokosk. p. 218. 



= Sargassum Rodgersianum Harv.: Clianict. of New Alg. p. '527. 



= Fueus patens Ac: in Act. Holm. 1815. p. 244. 



= Fucus pUuIifcr ,9 major Turn.: IILst. Fuc. Vol. I. p. 146. 



= HaIochloa patens Kütz.: Spec. Alg. p. 632. -7rf.: Tab. Phyo. XT. 

 Taf. I. fig. 1. — ISIartens: Pieus. Exped. Tange, p. 116. 



= Anthophycus japonicus IMart.: Preus. Exped. Tange, p. 115. 



= Carpophijllum? japonicwn De Toni: Phye. Jap. Nov. p. 46. 



Description of the species. The youngest plants of this 

 species have a few basal leaves growing almost radically from the 

 top of a disc-shaped root. The primary basal leaves are usually 

 simple, elliptical or obovate, with a short flat petiole : but the 

 successive upper ones become much longer, alternately lobed, 

 with the lobes narrowed at the points of divergence and mostly 

 elliptical in outline. 



The younger basal leaves elongate further by apical growth 

 adding a few lobes, as it were, successively above the older ones. 

 When they have grown several inches in height, the upper lobes 

 eventually become narrower and pinnately sected. Leaves in 

 this stage are no longer leaves but branches, and the lobes are 

 evidently the definite brunches, i. e. the leaves. This manner of 

 development is characteristic of Phyllotricha J. Ag. and Schizo- 

 phyciis J. Ag. 



The leaves on the lower portions of the branches are some- 

 times simple and sometimes divided. The simple ones are linear- 

 spathulate more or less narrowed upwards with the margins 

 subentire or sparingly dentated : the base is very often oblique, 

 terminating in a short petiole. The divided leaves usually 

 diminish in breadth: tlie margins are mostly subentire but often 

 roughly toothed. 



The upper leaves on the stems become gradually narrower 



