⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record tro-35179317, with some changes.

Atrichum undulatum var. altecristatum Renauld & Cardot is a synonym of Atrichum altecristatum (Renauld & Cardot) Smyth & Smyth, Lumina C. Riddle

The record derives from Tropicos which reports it as a synonym (record 35179317) with original publication details: Bot. Gaz. 15: 58 58 1890.