based on honeycombing (pic 1), distinct midrib and indented apex
could be R sorocarpa due to the growth at right angles, but seems more green than yellow/blue green
it's a Riccia so corrections very welcome
In an ephemeral pond. Identified as R. duplex var. megaspora by Chris Cargill.
Liverworts in a sub-alpine wetland beside the creek. Elevation approx 1500m