Bryum klinggraeffii

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Identification notes

At first sight this plant looks very similar to a number of other tuber-bearing Bryums of disturbed habitats, and the identification depends on examination of the subterranean parts. In practice any Bryum of disturbed soil that is not obviously B.dichotomum or B.rubens is worthy of further study.

The leaves are like many other similar species. Lanceolate in shape, with a poorly defined border, excurrent nerve and sometimes a weakly denticulate leaf border. Washing off soil from the rhizoid network reveals abundant small dark red tubers, usually less than 100µm wide, irregular in shape with protruberant cells.

It is generally found on disturbed basic soils such as arable fields, but also on exposed soil beside watercourses in well illuminated areas.

Distribution in Great Britain and Ireland

This is a lowland species but widely distributed in suitable habitats.

View distribution from the BBS Atlas 2014

Resources you may find useful

Holyoak, D. 2021. European Bryaceae.

David Holyoak’s book contains keys, detailed morphological, ecological and taxonomic descriptions and diagrams showing key features – and is highly recommended for anyone wishing to get to know Bryum species.

Porley R.D. (2008). Arable Bryophytes. WILDGuides Ltd, Basingstoke.

This useful little guide contains brief descriptions and a 2-page spread with photos of the tubers of many Bryum species for easy comparison.

The Bryophyte identification page under Resources contains additional information on the genus Bryum, including an early version of the keys now published in David Holyoak’s book.

Bryophyte identification resources

Similar species (to be added)

Bryum sauteri

Bryum violaceum