*1: Trefusis Grove,
Falmouth, 1839, EAW
(TRU) (Paton 1969a:
744).
*2: Near Trehane,
Probus, 1861, ES (TRU) (Paton 1969a:
744).
Habitat notes from Cornwall are as follows. Grows
in variety of mainly well shaded or partly shaded sites that
are sheltered and rather humid, often close to streams,
rivers, reservoir edges, or ditches. Recorded on moist soil of
banks, stream-banks, 'hedges', slaty and gabbro rocks
(including large amounts on vertical rock in old quarry), old
masonry (walls and concrete), tree bases and sometimes higher
on trunks (Grey Willow, Sycamore). Often occurs in large
quantities as the dominant bryophyte forming extensive mats on
silted bark of riverside trees within lower part of regular
flood-zone (on Alder, Ash, Grey Willow, Sycamore). Usually on
sloping or vertical substrates, but sometimes on horizontal
ones, e.g. of bark. The sites were partly shaded by bushes or
well shaded in old quarries, disused railway cutting, on low
bank in grove of trees, stream banks in deciduous woodland,
once in old wet Grey Willow carr, damp and sheltered roadside
banks, base of mortared and concrete walls and ruins of old
china clay works, once in shaded hollow inside ruin of mine
building. Also sometimes unshaded on river banks. Associates
include Kindbergia
praelonga, Leskea
polycarpa,
Orthotrichum rivulare, Plagiochila
asplenioides,
Sanionia uncinata.
Commonly c.fr.: capsules immature 1, [3 few], 9-12;
dehiscing 2, 3, 12; dehisced 1-8, 10, 12.