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UK Nature  > Mosses  > Mnium hornum

Scientific Name:   Mnium hornum
Common Name:   Swan's-neck Thyme-moss

Mnium hornum, or as it is more commonly known, Swan’s-neck thyme-moss, is one of Britain’s most common mosses. It is a dark, dull green, with large 'leaves' that are almost fern like and velvety. In spring the new, almost yellow leaves contrast with the older, dark-green leaves.

In the UK it is often found in damp woodland conditions, particularly when the soil is acidic. Typically, this is in oak-birch woodlands, but also beech or pine woods. It is abundant on the ground, but also grows on logs, rocks, tree bases and along stream banks.

The stalks (seta) that support the spore capsules are dark reddish-brown and yellowish-green above, upright, 2–4cm tall, densely hairy. The spore capsules (sporophytes) are produced by female plants. They are 5mm long with the lid narrowing abruptly into a very short point.
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