*1: In crevices of wall
on steep rocky bank on sea-cliffs, 80 m alt., Porthmoina Cove,
W. of Zennor, 1979, DGL & JAP 7658 (E) (Long & Hill 1982: 167,
Hill 1984b: 27).
Grows as scattered plants or forms pure low lawns
that may reach 50 cm or more in diameter. Several records from
Isles of Scilly from steep to vertical or slightly overhanging
gritty sand of sandrock forming low coastal cliffs, apparently
avoiding sunny S.-facing cliffs and forming the largest
populations in damp N.-facing sites, occurring only where the
cliff is above the splash-zone during the highest tides.
Associates sometimes include Didymodon
tophaceus.
Two records from mainland: both of tiny and rather
nondescript 'shade form' with leaves almost unbordered:
Porthmoina Cove (vc1), in small quantity on bare, red, clayey
soil of crevices in old, N.-facing wall of granitic blocks on
sea-cliff; species present sparingly on similar substrate
close by were Bryum
dichotomum, Epipterygium tozeri
and Weissia sp. SE.
of Cape Cornwall (vc1): small amounts, forming pure 'lawns' of
tiny plants on firm, steep to vertical soil in crevices of old
retaining wall (of blocks of granitic rock), on slope above
sea-cliff.
Not seen c.fr. on mainland, but capsules frequent
on Isles of Scilly: immature 4.
