*1: Rubbly roadside
wall, Treveyan [sic
= Trevoyan], St Merryn, Apr. 1958, TL (Warburg 1961: 164,
Paton 1969a: 725). This record is older than that published as new for
vc1 by Warburg (1962: 370).
*2: Polperro, before
1919, FR (BM) (Rilstone 1919, Paton 1969a:
725).
Grows as low lawns or smaller patches, sometimes as
low tufts of tightly packed stems. Notes on habitats in
C&S are as follows. Occurs mainly on calcareous masonry or
thin soil overlying it, on vertical and sloping to horizontal
surfaces and in shallow crevices, of (mainly old) concrete,
mortar and brick, on walls (especially old walls), bridges,
masonry near streams, lakes and Bude Canal, graves, discarded
concrete blocks and concrete fragments lying on ground and
among stony rubble on a track. Despite the Flora's statement that
it does not grow on soil (Smith 1978: 263, cf. T.L. Blockeel
in Hill et al.
1992: 276), recorded in small amounts on soil at least 14
times in Cornwall, on hard often stony soil e.g. on tops of
walls, on slope of 'hedge', among mine-spoil, in old quarry,
at compressed edge of gravel car park, but also on soil heaps,
on sandy soil close to edge of tarmac of road, on compacted
sandy soil of footpath in fixed dunes and on other disturbed
ground. Three records from old tarmac at edges of tracks and
minor roads; one from slaty rock above old railway cutting;
one from granitic boulder on china-clay spoil. Usually grows
on free-draining substrates, although often in humid sheltered
places. Most often fully insolated or at most part shaded, but
a few records in heavier shade; found once at edge of grove of
trees and once inside deciduous woodland. Sometimes occurs in
fully open situations close to coasts. Associates recorded
include Aloina
aloides, Barbula
convoluta, Didymodon fallax, Didymodon insulanus,
Didymodon
nicholsonii, Didymodon rigidulus,
Grimmia trichophylla
s. l., Pseudocrossidium
hornschuchianum, Schistidium
crassipilum, Syntrichia montana, Tortula muralis, Trichostomum
brachydontium, Trichostomum
crispulum.
Rarely c.fr. in Britain,
the capsules maturing in spring (T.L. Blockeel in Hill et al. 1992: 276);
five records c.fr. in Cornwall: capsules immature
1-3, 10, dehiscing 3, dehisced 3.
