Ixeridium alpicola (Takeda) Pak & Kawano (original description)
Ixeridium dentatum subsp. kimuranum (Kitam.) Pak & Kawano (original description)
Ixeridium dentatum subsp. kitayamense (Murata) Pak & Kawano (original description)
Ixeridium dentatum subsp. nipponicum (Nakai) Pak & Kawano (original description)
Ixeridium dentatum subsp. shiranense (Kitam.) Pak & Kawano (original description)
Ixeridium gracile (DC.) Pak & Kawano (original description)
Ixeridium laevigatum (Blume) Pak & Kawano (original description)
Ixeridium parvum (Kitam.) Pak & Kawano (original description)
Ixeridium pusillum (Mattf.) Pak & Kawano accepted as Ixeridium laevigatum (Blume) Pak & Kawano (original description)
Ixeridium pygmaeum (Zoll. & Moritzi) Pak & Kawano accepted as Ixeridium laevigatum (Blume) Pak & Kawano (original description)
Ixeridium sagittarioides (C.B.Clarke) Pak & Kawano (original description)
Ixeridium siamense (Kerr) Pak & Kawano (original description)
Ixeridium subacaule (J.Kost.) Pak & Kawano (original description)
Ixeridium transnokoense (Sasaki) Pak & Kawano (original description)
Ixeridium yakuinsulare (Yahara) Pak & Kawano (original description)
Ixeris sect. Chinenses (Tzvelev) Pak & Kawano (original description)
Ixeris strigosa (H.Lév. & Vaniot) Pak & Kawano (original description)