⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-35140521, with some changes.
This name is a synonym of Didymodon rigidulus var. gracilis (Schleich. ex Hook. & Grev.) R.H. Zander.
The record derives from Tropicos which reports it as a synonym (record 35140521) with original publication details: J. Hattori Bot. Lab. 39: 519 519 1975.