Working through the keys down all uncertain avenues brought me to Scorpiurium circinatum, Amblystegium serpens, Conardia compacta and Oxyrrhynchium hians/speciosum. The two Oxyrrhynchium species were eliminated by their cell length. both are 40µm long whereas mine was only half that. Scorpiurium was ruled out straight away with S.circinatum have appress leaves when dry and not only this both plants look completely different. Amblystegium serpens was ruled out by having a longer narrower leaf shape. Conardia compacta looks quite close but this species has a costa that runs almost to the leaf tip and rhizoidal growth from the back of the costa.
|Rhynchostegiella pumila through the microscope|