Tithymalus caespitosus Euphorbia caespitosa subsp. ventanicola Euphorbia caespitosa subsp. typica Euphorbia cespitosa var. angustifolia Euphorbia cespitosa var. ventanicola Euphorbia caespitosa var. ventanicola Euphorbia cespitosa subsp. typica
Taxonomic data from World Flora Online, accessed June 20, 2024