English name: Yelllow fringe-moss
An acrocarpous moss that stands out when it forms loose, dark green or almost black tufts with yellow-green shoot tops. The blunt leaves usually have teeth. The long, straight capsules are held on a long seta.
Capsules mature in spring.
In Scotland, Racomitrium aciculare is widespread on tops of periodically inundated rocks in fast-flowing, base-poor rivers and on flushed rock outcrops. BBS distribution map
Look out for Scapania undulata nearby.
scottishlichens.co.uk 