Photo
by Dr M Lueth ©.
*1:Penzance, 1844, AG (PNZ) (Paton 1969a: 753).
*2: Bodmin, 1878, RVT (B) (Paton 1969a:
753).
Forms low smooth mats, sometimes extensive, or
sparser and intermixed with other bryophytes. Habitat notes
from C&S are as follows. Common on various firm basic to
circum-neutral substrates, including rock (slaty,
serpentinite, gabbro, sometimes granitic), masonry (mortar,
mortared-walls, concrete) and firm soil, or growing as
epiphyte (see below). Its sites are normally free-draining,
often dry, sometimes rather moist, varying from fully
insolated to (most often) partly or moderately shaded, or
sometimes heavily shaded. Habitat types in which it occurs
frequently are walls, ruins, bridges, viaducts, mill leats,
concrete fence-posts, masonry debris, graves, gravestones,
etc., on and above sea-cliffs and in 'hedges' (often as small
patches in otherwise rather acidic surroundings) and soil at
base of walls and on banks (occasionally in woodland). Once on
soil of plant pots in a nursery garden.
Frequent also as epiphyte, especially on the moist
nutrient-rich bark of Elders, where typically on the trunk or
low horizontal or inclined branches. Other records are from
Ash, elm, Grey Willow and Sycamore bark, mainly on tree bases.
It occurs as an epiphyte in scrub, woodland edges, etc.,
including bark in inundation zones beside reservoirs; also
e.g., on an old decaying elm trunk on
ground.
Associates on rock and masonry often include Amblystegium serpens
var. serpens, Barbula convoluta, Barbula
unguiculata,
Brachythecium rutabulum, Bryum capillare, Oxyrrhynchium
hians, Kindbergia
praelonga,
Homalothecium sericeum, Lejeunea
lamacerina,
Metzgeria furcata,
Rhynchostegiella tenella, Tortula muralis;
those recorded on bark include Amblystegium serpens
var. serpens, Brachythecium
rutabulum.
Commonly c.fr.: capsules immature 1, 8-12;
dehiscing 1-3 [4, 5] [8, 9] 10-12; dehisced 1-6, 11,
12.
|