Euphorbia cumbrae Boiss. Euphorbia cumbrae Boiss., Cent. Euphorb.: 16. 1860 sec. Steinmann 2025≡Chamaesyce cumbrae (Boiss.) Millsp., Publ. Field Mus. Nat. Hist. Bot. Ser. 2(11): 408. 1916 syn. sec. Martínez-Gordillo & al. 2006