Very common species.
rounded clumps on stone bridge walls
Images of the leaf tips of Racomitrium pruinosum showing the distinctive teeth diagnostic of this species. For relevancy of this posting see http://naturewatch.org.nz/observations/2012682
Images based on AK 359004 - specimens sent to me by Dr Trevor Partridge for identification.
On exposed sandstone bedrock in open glade.
This is what we commonly describe locally as R. languinosum, but on advice from Peter de Lange, have not used that until it has been properly identified, something Peter is arranging to have done. I will update the record when that happens. There are vast quantities of this at the site, but it will burn off as the days heat up and will be barely visible during summer.