Euphorbiaceae
Euphorbia abyssinica
Croton tiglium
Cnidoscolus aconitifolius
Cnidoscolus eslasticus
Caryodendron orinocense
Aleurites mollucanus
Euphorbia neriifolia
Old World, spiny succulent cactus analog. Makes a great livestock-resistant living fence.
Images show renovation pruning of Euphorbia neriifolia living fence in Cuba.