(5) A. BENNETT. JAPANESE POTAMOGETONES. 549 



young, becomes straight as ihe fruil ripens, as Ihe case with olher 

 species. 



In addition lo Ihe Père Faurie's station, 1 hâve il from, 



Nippon media; and Kinsin. Simabara; gathered by Maximowicz, and 

 Tschonoski : and Makives, losa ; Kiibokawa, Hiragiishi. Musashi : lyoda, 

 _^th gathered by himself. 



P. Robbinsii Oakes var. japonicus mihi. 



Lac d'Akan. 3 août 1893. N. 10712. 



Allhough so différent in appearance to Ihe N. American species, there 

 is really no absolute characlers by which it could be speciflcilly distin- 

 guished. Differs from the type by the longer internodes, leaves conside- 

 rably shorter, much less acute (in many the apex is produced into a 

 false mucro, formed by the apical portion of the leaf being turned back, 

 probable produced in the drying?), the stipules are rather shorter and 

 seem to decay sooner. In the type the arrangement of the leaves is 

 very regulär (they are doser together), and gives the plant a symetrical 

 appearance quite wanting in the Japanese plant. The spécimens are 

 only just flowering, and hâve no sign of fruit; the type is one of the 

 rarest species in fruit having only been gathered three times in Ihat 

 State. 



I hâve to thank M. Faurie for a set of his Japanese species, sent to me 

 through M. Autran of Chambesy, Geneva. 



June 16th 1896. 



