The following four naturalCheilantheshybrids are described: 1.—C.×teneriffae, the diploid hybrid ofC. maderensisLowe ×pulchellaBory ex Willd. found in Tenerife (Canary Island) which, according to genome analysis (VIDA et al., 1981), is the direct forerunner of the allotetraploid speciesC. guanchicaBolle. 2.—C. × ibericafound in Spain, a triploid hybrid ofC. hispanicaMett. andC. tinaeiTod. which we regard as a backcross of the allotetraploidC. tinaeiwith one of its parents. 3.—C. ×insularis, a tetraploid hybrid ofC. guanchicaandC. tinaeifound on the islands of Corsica, Maddalena and Sardinia. 4.—C.×malacitensis =C. guanchica × pteridioides(Reich.) C. Chr., found in Spain (Prov. Màlaga). The latter had already been synthesized under experimental conditions (VIDA et al., 1981).