THE FUCACE.E OF JAPAN. 73 



que irlandulosis ; vcsiculis in jietiolo coniplaiiato elliptico-spliajricis, folio 

 majore loiiije stipitato coronatis; receptaeulis 



Description of the species. In the preliminary list of Fucaceœ 

 of Japan, I. c, I mentioned the present species established from a 

 fragmentary sterile specimen that I collected at Kushimoto, Kii 

 Prov. Among the specimens preserved in the herbarium of the 

 Sapporo Agricultural College, I also found a complete though 

 sterile specimen of the same species, collected at Shibushi, Hiuga 

 Prov. I do not hesitate to mention them under the new specific 

 name on account of the unique characters revealed in the specimens. 



The root is scutelate with a primary stem on it. The stems 

 of the principal branches are smooth, subcompressed with rounded 

 edges, from which the lateral branches are sent off distichously and 

 alternately. The leaves on the principal branches are thin and 

 papyraceous, turning a dirty whitish colour on drying due to a 

 powder-like substance on the surface of the lamina. They are 

 simple, li near-spa thulate, narrowed above, measuring o-lOcm. in 

 length and l.ö-2cm. in width at the broadest part. The petiole is 

 complanated and short, and expands abruj)tly into the lamina. An 

 immersed rib runs from the j^etiole quite to the apex of the leaf. 

 Minute, dark cryptostomata are found on both sides of the rib, 

 disposed with no apparent regularity. They are invisible except by 

 translucent light, owing to the grayish hue of the leaves. The 

 margin is coarsely dentated with sharp and spinulose teeth. 



Vesicles are ovate or spherical with a long complanated stalk 

 below and a large crown leaflet above. The latter is often as large 

 as an ordinary leaf which it resembles, except that the basal portion 

 gradually attenuates into a long compressed stalk. In the Kii 

 specimen we have a bifurcated leaflet ujjon a vesicle, as shown in 

 PI. XVI. fig. 20. But this may be an abnormal case. 



