Plagiomnium medium, commonly known as Alpine thyme-moss[3] or intermediate plagiomnium moss,[4] is a moss found in montane habitats in the Northern Hemisphere.

Research published in 1988 showed that is a hybrid of P. ellipticum and P. insigne via an allopolyploid process, previously considered to be absent in bryophyte evolution.

[5] In the UK it is classified as near threatened.

More than 10% of all UK populations occur in the Cairngorms National Park in Scotland including sites in the Lairig Ghru and on the plateau of Lochnagar.

This Bryidae-related article is a stub.