*1: Trefusis,
Falmouth, 1845, EAW
(TRU) (Paton 1969a: 742).
*2: Near Helman Tor,
1891, RVT (B) (Paton 1969a:
742).
Usually grows in small cushions, occasionally
forming large patches. Notes on habitats in Cornwall are as
follows. Normally only seen as an epiphyte:commonest on Elder
and Grey Willow, frequent on Blackthorn, Hazel, Sycamore;
fewer records on Alder, Ash, elm, Gorse, Sessile Oak,
Traveller's Joy; once each on Cortaderia, Cotoneaster
integrifolius, Picea abies (dead
twigs), Rowan and Wild Privet. Almost always in sheltered,
moist places such as carr of Grey Willow, other damp scrub or
deciduous woodland, but avoiding sites that are really heavily
shaded. Occurs on vertical, inclined and horizontal bark
of trunks and
branches, from near ground-level to over 2 m above it,
sometimes on twigs in humid locations. Often growing as just a
few small patches that are easily overlooked among other
epiphytic mosses, but occasionally forming large patches (once
in patches up to 15 cm long on a sheltered Elder). Frequent on
bark within flood-zone of R. Tamar and occasional in upper
part of inundation-zone of reservoirs. Sometimes an early
colonist in scrub, e.g. around china clay
quarries.
Unusual record of small patch growing on stem of Cryphaea heteromalla
that was itself epiphytic on a small branch of an Elder in
stream-side scrub near Lavrean. Single record of well-grown,
fertile patch on vertical side of granite boulder under Grey
Willows but near track in working china-clay quarry that
produces much dust. Another record c.fr. on horizontal top of
granitic boulder slightly shaded by Sycamores; once on granite
block by stream; another record on granite of bridge parapet
in light shade; also a single small patch c.fr. on granite
boulder in open high on Rough Tor. Several patches on a
concrete fence post near old quarry.
Common associates include Brachythecium
rutabulum (sparse growths), Cololejeunea
minutissima, Cryphaea
heteromalla,
Frullania dilatata, Hypnum andoi, H. cupressiforme var. resupinatum, Microlejeunea ulicina,
Metzgeria
consanguinea,
M. furcata, M. violacea, Orthotrichum affine,
O. diaphanum, Ulota bruchii, U. crispa, U. phyllantha; less
common associates include Orthotrichum
tenellum.
Commonly c.fr. [only recorded with capsules]:
capsules immature 1-5 [7], 10-12; dehiscing 3-6 [7]; dehisced
[old 1-4], 3-12.
