| Olgaea altimurana (Rech.f.) Rech.f. | Olgaea eriocephala (C.Winkl.) Iljin trib. Cardueae |
| Olgaea hsiaowutaishanensis (F.H.Chen) Y.Ling | Olgaea lomonossowii (Trautv.) Iljin trib. Cardueae |
| Olgaea nidulans (Regel) Iljin | Arctium nidulans (Regel) Sennikov trib. Cardueae |
| Olgaea sinensis (S.Moore) Iljin | Olgaea lomonossowii (Trautv.) Iljin trib. Cardueae |