About YAMANOUCHI TAKASHI
About 水草研究会誌
About Tochigi prefecture
About aquatic plant
About field study
About hybrid
About Potamogetonaceae
About growth
About morphology(form)
About 野元川
About Potamogeton nomotoensis
About growth
About plant form
About Plant ecology
About Plant morphology and anatomy
About 栃木
About 固有
About 雑種
About ヒルムシロ科
About 状況