*1: Penzance, undated,
EMH (GL) (Paton 1969a:
*2: Saltash, 1879, RVT
(B) (Paton 1969a: 726).
Forms cushions or patches on steep dry to damp
calcareous masonry. Recorded growing on mortar and directly on
nearby rock surfaces (including granite) of mortared-stone
walls e.g. at roadsides, around cemeteries, of churches, and
on railway bridge, fully insolated or lightly or partly
shaded. Associates include Rhynchostegiella
crispulum; seen once with Grimmia
Deciduous leaf tips are invariably present and
doubtless serving as propagules. A dioicous species for which
capsules are unknown in Britain.