Calendula brachyglossa Rupr. (original description)
Calendula tripterocarpa Rupr. (original description)
Centaurea canadensis Hort.Huber ex Regel (original description)
Centaurea tenuiramea Delile ex Herder (original description)
Closia chilensis Regel & Körn. accepted as Perityle emoryi Torr. (original description)
Cosmidium burridgeanum Hort. ex Regel accepted as Thelesperma burridgeanum S.F.Blake (original description)
Dimorphotheca lilacina Regel & Herder accepted as Dimorphotheca barberae Harv. (original description)
Dyssodia alternifolia (Moc. & Sessé ex DC.) Regel & Körn. accepted as Dyssodia porophyllum var. radiata DC. (original description)
Eupatorium haageanum Regel & Körn. accepted as Ageratina haageana (Regel & Körn.) H.Rob. (original description)
Eupatorium microcephalum Regel (original description)
Eupatorium weinmannianum Regel & Körn. accepted as Ageratina ligustrina (DC.) R.M.King & H.Rob. (original description)
Guenthera Regel accepted as Xanthocephalum Willd. (original description)
Guenthera viscosa Regel accepted as Xanthocephalum gymnospermoides (A.Gray) Benth. & Hook.f. (original description)
Jurinea lyrata Trautv. (original description)
Kalimeris altaica var. subincana Avé-Lall. (original description)
Lactuca amurensis Regel & Maxim. accepted as Lactuca indica L. (original description)
Lactuca japonica (Thunb.) Regel accepted as Youngia japonica (L.) DC. (original description)
Pyrethrum setifolium Regel (original description)
Senecio ghiesbreghtii hort.hal. ex Regel accepted as Telanthophora grandifolia (Less.) H.Rob. & Brettell (original description)
Senecio longiradiatus Trautv. (original description)
Senecio philippicus Regel & Körn. (original description)
Venidium speciosum Regel (original description)