Scientific Name: Atrichum undulatum (Polytrichaceae).
English Name: Common Smoothcap; Catherine's Moss.
5 Key Characters:
- pointed undulating leaves when wet, up to 1 cm long (crisp when dry).
- very long beak on capsules.
- robust, can form extensive patches, grows in loose tufts.
- edges of leaves finely toothed.
- ridges of tissue over the central nerve down the length of the leaf.
Lookalikes: Swan's-neck Thyme-moss Mnium hornum, which has shorter oval leaves with no undulations. Hart's-tongue Thyme-moss Plagiomnium undulatum, which has blunter leaves.
Habitat: Almost every woodland. Shaded, well-drained sites, banks and anthills in grassland, heaths, rocky ledges.
Status: Very common in woodland.
Photographed by Loire Valley Nature: