⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record tro-5106698, with some changes.

Pilocereus royenii var. armatus Rumpler is a synonym of Cereus armatus Otto ex Pfeiff.

This name is a synonym of Cereus armatus Otto ex Pfeiff..

The record derives from Tropicos which reports it as a synonym (record 5106698).