⚠ Version 1 of The Plant List has been superseded.

This name record (from Tropicos) is not included in version 1.1 of The Plant List. It is possible the same name is included from a different data source, to check this you can search for Echinocereus acifer in version 1.1 of The Plant List.

Echinocereus acifer var. durangensis K. Schum. is a synonym of Echinocereus polyacanthus Engelm.

This name is a synonym of Echinocereus polyacanthus Engelm..

The record derives from Tropicos which reports it as a synonym (record 5105306) with original publication details: Gesamtbeschr. Kakt. 287 287 1898.