Euphorbia enopla var. enopla resembles E. atrispina and E. heptagona, but E. enopla has more spines on the stems that are thicker and have more angles, and the terminal spines on the growing tips are reddish-purple. We previously offered this plant as E. heptagona, which we now have as well. This species can grow outside in Tucson and has taken the mid-20s F without damage in our shadehouse. We have rooted cuttings available in 4-inch pots.