⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record tro-35146498, with some changes.

Grimmia aterrima Müll. Hal. is a synonym of Racomitrium crispulum (Hook. f. & Wilson) Hook. f. & Wilson

This name is a synonym of Racomitrium crispulum (Hook. f. & Wilson) Hook. f. & Wilson.

The record derives from Tropicos which reports it as a synonym (record 35146498) with original publication details: Bot. Jahrb. Syst. 5: 81 81 1883.