Artemisia gallica subsp. gargantae (Vallès-Xirau & Seoane-Camba) Rivas Mart. & Cantó (original description)
Artemisia pedemontana subsp. assoana (Willk.) Rivas Mart. accepted as Artemisia campestris subsp. variabilis (Ten.) Greuter (original description)
Carduncellus mitissimus subsp. pseudomitissimus (Rivas Goday & Rivas Mart.) Rivas Mart. accepted as Carthamus hispanicus subsp. pseudomitissimus (Rivas Goday & Rivas Mart.) Greuter (original description)
Carduus carpetanus subsp. braun-blanquetii (P.Monts.) Rivas Mart. (original description)
Centaurea rouyi var. segariensis (Figuerola, Peris & Stübing) Rivas Mart. & M.J.Cos (original description)
Centaurea sphaerocephala var. polyacantha (Willd.) Rivas Mart. accepted as Centaurea sphaerocephala subsp. polyacantha (Willd.) Dostál (original description)
Doronicum pyrenaicum (J.Gay ex Gren. & Godr.) Rivas Mart. accepted as Doronicum grandiflorum Lam. (original description)
Homogyne alpina subsp. cantabrica (Losa & P.Monts.) Rivas Mart., T.E.Díaz, Fern.Prie (original description)
Launaea fragilis subsp. viminea (Lange) Rivas Mart. (original description)
Phagnalon saxatile subsp. intermedium (Lag.) Rivas Mart. accepted as Phagnalon saxatile (L.) Cass. (original description)
Reichardia intermedia subsp. gracilis (Sch.Bip.) Rivas Mart. (original description)
Reichardia ligulata var. crispa (Webb & Berthel.) Rivas Mart. accepted as Reichardia ligulata (Vent.) G.Kunkel & Sunding (original description)
Silybum gonzaloi Cantó, Sánchez Mata & Rivas Mart. (original description)
Sonchus tenerrimus var. dianae (Lacaita ex Willk.) Rivas Mart. accepted as Sonchus tenerrimus L. (original description)