A Monomgph of the Geiiiii Ahiria. g^ 



cylindrical petiole which is persistent on the stipe after the sporophyll 

 has dropped ; tip obtuse or rounded. Sorus in a continuous patch 

 on both surfaces of each sporophyll, occupying generally the entire 

 urea of the surface, except a very narrow border along the margin, 

 but frequently leaving the upper part sterile and membranaceous. 



Remarks on the afßnUy of the species. The present plant has 

 some resemblance to A. dolichorhachis Kjell^i. and A. lancjolata 

 K.JELLM. But it may be readily separated from them by having 

 extremely thin, membranaceous, corrugated blade as well as a 

 peculiar kind of glandular cells. In general appearance of frond, 

 it stands most closely to A. macroptera, so that I was rather un- 

 certain if it would not be better mentioned under its varietal rank. 

 From that species, however, it may be distinguished by rich 

 cryptostomata and glandular cells in the blade, by non-approximate 

 sporophylls, and by the petioles of the dropped sporophylls re- 

 maining attached to the stipe. 



The form conception of A. esculenta pimiatljlda P. et R. taken 

 by the authors is rather difficult to understand. The definition 

 given in 111. Alg., p. 11 is well applicable to this species. But, as 

 far as I could understand from the original in the herbarium of 

 the Academy of Science of Petrograd, as determined and arranged 

 by PtUPEECHT, there appear more than two distinct forms under 

 the formic name. One of them, collected in Kamtschatka, has 

 certain resemblance to A. Pylaii. The others approach to either 

 A. macroptera or the present. 



As remarked under the preceeding species, the plant which 

 Saunders has identified with A. laticosta K.jellm. seems to have 

 certain points comparable with this species. 



Locality. Southern part of Sakhalin (K. Miyabe, Herb. S. 

 A. C.) ; Aniwa Bay, Sakhalin (S. Mukata) (!). 



