Ostericum grosseserratum (Maxim.) Kitag. (Synonym : Angelica koreana Maxim.)

Family : Apiaceae

Ostericum maximowiczii (F.Schmidt) Kitag. (Synonym : Angelica maximowiczii (F.Schmidt) Benth. ex Maxim.)

Family : Apiaceae

Ostericum sieboldii (Miq.) Nakai (Synonym : Peucedanum sieboldii Miq.)

Family : Apiaceae

Ostrya japonica Sarg. (Synonym : Ostrya ostrya MacMill. var. japonica C.K.Schneid.)

Family : Betulaceae

Ottelia alismoides (L.) Pers. (Synonym : Stratiotes alismoides L.)

Family : Hydrocharitaceae

Oxalis acetosella L. (Synonym : Oxalis acetosella L. var. purpurascens H.Mart.)

Family : Oxalidaceae

Oxalis articulata Savigny

Family : Oxalidaceae

Oxalis bowiei W.T.Aiton ex G.Don

Family : Oxalidaceae

Oxalis corniculata L. (Synonym : Oxalis taimoni Yamam.)

Family : Oxalidaceae [Naturalized plant]

Oxalis debilis Kunth var. corymbosa (DC.) Lourteig (Synonym : Oxalis japonica Franch. & Sav.)

Family : Oxalidaceae