THE FUCACEJ:: OF JA PAX. 11Ô 



• 



not exceeding ;iii inch in length, are provided, like the huds 

 of the AsparagUi^, with spirally disposed, scale-like, imbricate 

 leaves. Then they commence to send out a short lateral branch 

 from each axil of the scale-like leaves. The whole aspect of a 

 principal branch in tiiis stage is simple and vermicular, apparently 

 resembling liliodomela Larix. AVhen further grown with the 

 lateral members eventually more distant and elongated, the frond 

 becomes deconipoundly and densely ramose. Turner's Hist. Fuc, 

 1. c, illustrates these stages in a satisfactory manner, and the 

 diagnosis hitherto given to the species very well applies to such 

 forms. Some of the forms found in the northern parts as well 

 as on the coast of the Japan Sea side have more or less dis- 

 tinctly marked characters to be distinguished from those above 

 stated. Hence the following: — 



/'. typit'd, nov. nom. 



= Fucus Thunbcrgii Tukn. Hist. Fuc, 1. c. 



/. lati folia, form. nov. 



Diagnosis. Eaiiiis lateralihus brcvioribus, folii.s fiilcrantibiis lanceulatis, 

 ramulorum subulato-lanceolatip, sœpo oblique cuneatis, parce glanclu- 

 losis; vesiculis obovatis, nnicronatis, stcpe muticis; rcceptaculis cylin- 

 draceis l)reve stipitatis. 



/. nippotiica, form. nov. Plate XV. Fig. 5. 



Diagnosis. R-imis lateralibus longissimis densissime vesiculiferis; foliis 

 fulcrantibus subulato-lanceolatis, angustissiniis, ramulorum plerunique 

 iu vesiculas traiisformatis; vesiculis minoribus, cllipsoidei.s, apiculatis; 

 receptaculis cyliudraceis, stipitatis, in ramulo abbreviato solitariis. 



Description of the formae. Forma typica flourishes in the warmer 

 parts of the Pacific side of Japan from 30° to 40° N. latitude. 

 It is characterized by having filiform leaves throughout the whole 

 of the frond except at the base. The lateral branches are always 



