70 AÎIT. 12. — K. YENDO. 



racemoso; ramis complanatis ancipitibus sursuni teretibus, pinuatim 

 ramulosis, piunis e niargine egredieutibus; ramulis teretibus vel cylin- 

 draceis piniiatis; foliis verticalibus, lineari-lanceolatis basi constrictis, 

 siniplicibus vel piiiuato-dichotomis costatis integerrimis vel erispato- 

 dentatis, utriuque pluri-serie glandulosis ; vesiculis sj)lia!rico-ovatis, folio 

 simplici vel furcato corouatis, glandulosis, in inferiore ramulorum 

 parte solitariis; receptaculis subcylindraceis verruculosis in ramulo 

 paniculatis. 



Description of the species. The plant attains 3-5 feet in total 

 length. The root is disc-shape of irregular outline, comparatively 

 small in size. From tJie uj^per surface of the root several shoots 

 often start off, each of which may ramify at a short distance from 

 the base almost multicipitally. The primary shoot is complanated, 

 linear-elongated, attenuated below into a short, terete stem, and 

 alternately pinnately divided above. An immersed rib traverses 

 the whole length of the axial segment and diverges into the lateral 

 segments quite to the apices. Thus the primary shoot is very 

 similar to that of Sargassum patens. But in the present species the 

 axial segment is from the very beginning of its growth more stem- 

 like. As the shoot grows further the axial segment becomes a 

 stem with enormously prolonged internodes, but remaining flat, 

 iuimersedly ribbed, and with ancipitous margins crispato-dentated. 

 The lateral segments develop int simple, basal leaves which are 

 narrowly lanceolate, attenuated upward, slightly ribbed, crypto- 

 stomated, and crispated or undulated in the margins. In some 

 cases basal leaves measured 20 cm. in length and 1cm. at the widest 

 part (PL IX. fig. 4.). 



The stem in the upper portions as well as in the lateral 

 branches is no longer ancipitous but terete, with the fulcrant leaves 

 at its compressed margins. Most of the fulcrant leaves are simj^le, 

 linear-lanceolate, but often pinnately divided with narrow segments. 

 Branches and branchlets start patently from the upper edge of the 



