⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record tro-35148600, with some changes.

Hemisynapsium arcticum (R. Br.) Brid. is a synonym of Ptychostomum arcticum (R. Br.) J.R. Spence ex D. T. Holyoak & N. Pedersen

The record derives from Tropicos which reports it as a synonym (record 35148600) with original publication details: Bryol. Univ. 1: 606 606 1826.