English name: Common tamarisk-moss
This is a distinctive pleurocarpous moss with bright, yellowish green or dark green shoots that are tri-pinnately branched and form loose mats. The branches are more or less arranged in one plane and tend to be triangular-shaped.
In Scotland, Thuidium tamariscinum is widespread in woodland and amongst grass in damp places where it is prefers neutral conditions. BBS distribution map
Look out for Dicranum scoparium, Hylocomium splendens, Plagiomnium undulatum and Rhytidiadelphus triquetrus nearby.
Confusion species: Hylocomium splendens
scottishlichens.co.uk 