*1: Land's End, 1874,
WC (CMM) (Paton 1969a: 741).
*2: Burnier, Bodieve
near Egloshayle, 1877, RVT (B) (Paton 1969a:
Notes on habitats in C&S are as follows.
Records nearly all from unshaded calcareous masonry,
especially old concrete or mortared walls, growing on
horizontal, inclined or vertical surfaces, e.g. on ruins of
mine buildings and china-clay dries, old retaining wall,
disused sewage works, disused railway station platform, modern
reservoir dam, grave stones and grave edges, bridges, on
foot-bridge, horizontal concrete, concrete blocks among dumped
masonry, twice on concrete fence-posts. Also on old mortar,
e.g. on church walls, a railway bridge and bridge over stream.
Single records from a slate roof (plentiful), an
asbestos-cement roof (plentiful), and from low natural outcrop
of serpentinite on unshaded top of sea-cliff. Atypical records
include one of it growing partly shaded on horizontal flat
concrete of wall top at edge of Sessile Oak woodland (S.
of Gweek), and in
small quantity on old tarmac of edge of track in rather
exposed coastal heathland (near Porthgwarra). Common
associates include Barbula convoluta
Didymodon rigidulus, Grimmia pulvinata, Orthotrichum
crassipilum, Syntrichia montana, Tortula muralis, Zygodon virisissimus
scarcer associates include Bryum argenteum, Orthotrichum affine, O. cupulatum, Syntrichia laevipila,
Commonly c.fr. [only recorded with capsules]:
capsules immature 1-5 (6), 10, 12; dehiscing 4-7; dehisced
[old 3], 4-11.