Steinmann, V. W., Flores-Olvera, H. and Ochoterena, H. (2026) “Euphorbia villarrealii, a new species from harsh environments of Coahuila, Mexico”, Phytotaxa. Auckland, New Zealand, 783(2), pp. 173–182. doi: 10.11646/phytotaxa.783.2.6.