⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-35157110, and has not been changed.
This name is a synonym of Atrichum undulatum f. thermophila .
The record derives from Tropicos which reports it as a synonym (record 35157110
) with original publication details: Bot. Iceland 4: 498. f. 9 498 1918.