108 Salviniaceae 



apex, hyaline on margin. Ponds and paddy fields; Honshu to orbicular-deltoid in oudine; stems or main axis closely 



(Kinki Distr. and westw.), Shikoku, Kyushu. China to In- branched, with rather numerous slender roots; leaves closely 



dia. imbricate, the lobes orbicular to orbicular-deltoid, about 2 mm. 



2. AzoIIa japonica Fr. & Sav. ex Nakai. A. pinnata var. long, rounded at apex, broadly hyaline on margin. ^Ponds 



japonica Fr. & Sav.; A. pinnata sensu auct. Japon., non R. Br. and paddy fields; Honshu, Shikoku, Kyushu; common. 

 O-AKA-UKiKUSA. Reddish herb about 2 cm. long, deltoid 



