⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record tro-50203045, with some changes.

Notocactus ottonis var. villa-velohensis Backeb. & Voll is a synonym of Notocactus carambeiensis var. villa-velhensis (Backeb. & Voll) Sida ex G. Dohnke

The record derives from Tropicos which reports it as a synonym (record 50203045).