Life … Plants Vascular Plants Dicots Nances, Willows, and Allies Spurge and Allies Spurges Devil's Backbone Euphorbia tithymaloides angustifolius subspecies Euphorbia tithymaloides angustifolius Euphorbia tithymaloides angustifolius Key traits Layer Shrubs Plant type Perennial Shrub From USDA PLANTS. Close