148 ART. 12. — K. YENDO. 



wing-like leaflet. They are often so large as to measure 3 cm. in 

 length, 1.7 cm. in width, and 1.5 cm. in thickness. The vesicles 

 on the upper branches as well as on the receptaculiferous ramulets 

 are generally elongated and much compressed. The wings traverse 

 the margin, continuous with the long linear leaflet at the upper 

 end of the vesicle, and frequently with the flattened stalk at the 

 lower end (Fig. 4,9). 



The vesicles on the younger portions of a frond are mostly 

 found solitary upon the petiole. But in a fully grown though not 

 fertile individual, we frequently find a cluster of two or more 

 vesicles with the "anläge" of a receptacular ramulet on each stalk. 



Receptacles differ greatly in external shape and size according 

 to the sexes. The male receptacles are linear-spathulate, rarely 

 obliquely cuneate, foliaceous, minutely verruculose, often measur- 

 ing 5 cm. long, 7 mm. wide, and 1 mm. thick ; both ends are 

 for the most part rounded, with a stalk 2-5 mm. in length at 

 the base. They are paniculately disposed on an upper branchlet 

 (fig. 6-8). The receptacles of female plants are compressed 

 siliquaeform, much smaller in size, and measure 5-11 mm. long 

 and 2-3 mm. wide. They are disposed in the same manner as 

 male receptacles, but are more regularly paniculate ; and usually 

 a larger number are found on a ramulet (fig. 5). 



Remark on the synonymy. Harvey's original diagnosis 

 sharply defines the j)resent species. He says, however, that the 

 branches are pinnate and the leaves decompoundly pinnate. This 

 description is hardly recommendable for such a plant as this, 

 with strongly retrofractive leaves and branches, and is not apj^li- 

 cable to well grown forms with fastigiate branches. 



J. Agardh described a new species 'in Spec. Sarg. Austr. 

 p. 58, under the name of Sargassum coreanum. He already 



