Centaurea iserniana (J.Gay & Webb ex Graells) Pau accepted as Mantisalca duriaei (Spach) Briq. & Cavill. (original description)
Centaurea matritensis Pau (original description)
Centaurea serratulifolia Sennen (original description)
Centaurea sudrei Sennen & Elias (original description)
Cirsium jaubertianum Sennen & Septimin accepted as ×Cirsio-carduus jaubertianus (Sennen & Septimin) Arènes (original description)
Conyza barcinonensis Sennen (original description)
Conyza royana Sennen (original description)
Xanthium almerae Sennen (original description)
Xanthium catalaunicum Sennen (original description)
Xanthium faurae Sennen (original description)
Xanthium hispanicum Sennen (original description)
Xanthium sallentii Sennen (original description)
Xanthium widderi Sennen (original description)