⚠ Version 1 of The Plant List has been superseded.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 Opuntia engelmannii in version 1.1 of The Plant List.
This name is a synonym of Opuntia engelmannii subsp. aciculata .
The record derives from Tropicos which reports it as a synonym (record
5107797) with original publication details: Cacti S. W. 178 178 1969.