Euphorbia serpillifolia var. hirtula (S. Watson) L.C. Wheeler
Euphorbia serpillifolia var. hirtula, Proc. Biol. Soc. Washington. 53. 1940 sec. Martínez-Gordillo & al. 2006
- =Euphorbia hirtula, Geological Survey of California. J. D. Whitney, State Geologist. Botany. 2. 1880 syn. sec. Martínez-Gordillo & al. 2006
- =Chamaesyce hirtula, Publ. Field Mus. Nat. Hist. Bot. Ser. 2(11). 1916 syn. sec. Martínez-Gordillo & al. 2006