Philonotis fontana (Fountain Apple-moss), June 2020 in the Brecon Beacons.
In this area, Philonotis fontana often seems to develop this branching at the shoot tips in late spring / summer. Presumably these are deciduous branchlets used for reproduction, as they are not visible later in the year so must have broken off and dispersed.
Published: 1 May 2020