@article {6,
	title = {On the Sea-Grasses in Japan II. Cymodoceaceae and Marine Hydrocaritaceae},
	journal = {Bot. Mag. (Tokyo)},
	volume = {48(566)},
	year = {1934},
	pages = {131-142},
	chapter = {138},
	author = {Miki, S.}
}
@article {4,
	title = {Observations on the Flora of Japan},
	journal = {Bot. Mag. (Tokyo)},
	volume = {26},
	year = {1912},
	pages = {208-211},
	chapter = {208},
	author = {Makino, T}
}
@article {14,
	title = {Hydrocharitaceae, Lemnaceae, Pontenderiaceae, Potamogetonaceae, Gentianaceae(Limnanthemum), Nymphaeaceae},
	journal = {Botanisk Tidsskrift},
	volume = {24},
	year = {1902},
	note = {(not seen)},
	pages = {260-263},
	author = {Ostenfeld, C.H.}
}
