- IPNI Life Sciences Identifier (LSID)
- Report on the United States and Mexican Boundary Survey, Made Under the Direction of the Secretary of the Interior, by William H. Emory. Volume 2, Botany
- Family as entered in IPNI
- Replaced synonym of
- Euphorbia georgei Oudejans, Phytologia 67(1): 45, nom. nov. (1989).
- Same citation as
- Euphorbia acuta Engelm.