Racomitrium Moss

Description

A widespread and locally dominant moss in rivers in western Britain. Shoots are 2 to several centimetres long. Although it frequently lives up to its English name, with a yellow-green colour, R. aciculare is often dark green or almost black. The 2.5-3.5 mm long, blunt leaves, which usually have teeth that are visible through a hand lens, are unique and diagnostic. The long (about 3 mm), narrow, straight capsules on a long seta are also almost unique in the regular haunts of Racomitrium species.