*1: Newlyn Cliff, 1866,
WC (PNZ) (Paton 1969a:
721).
*2: Near Tresillian,
1861, ES (TRU) (Paton 1969a:
721).
See notes under T. modica regarding
apparently intermediate specimens.
Grows as scattered stems or low lawns, sometimes
forming large patches. Notes on habitats in C&S are as
follows. A colonist of bare or mainly bare, usually neutral to
mildly acidic soils that are often free-draining (loamy, silty
or sandy) but sometimes also damp and clayey. Typical habitats
are on or beside paths and tracks, on roadside verges, on and
just above sea-cliffs, in quarries (both stone and china-clay
pits), open patches in grasslands, in arable fields (e.g.
barley, wheat, maize, stubbles, brassicas, flax, daffodils,
game-food crop, fallow, grass leys), in gardens, on
plant-pots, on soil heaps, on graves, dredgings from ditches
and ponds and similar disturbed ground generally, such as on
gravel tracks and car parks, lay-bys and about field gateways;
also thin soil over rocks or on 'hedges'. Mainly in unshaded
or lightly shaded places, but sometimes partly to moderately
shaded, e.g. along woodland tracks. Good patches twice found
on very thin soil over concrete in open or light shade
(presumably a calcareous substrate). Several records on old
tarmac of lanes and a few amongst spoil from metalliferous
mines. On mud and firm clay sediments exposed in inundation
zones beside reservoirs. A few records on sheltered granitic
boulders with very little or no accumulated soil. Associates
recorded include Acaulon muticum, Anthoceros agrestis,
A. punctatus, Barbula convoluta, Barbula unguiculata,
Bryum argenteum, Bryum dichotomum, Bryum klinggraeffii,
Bryum
subapiculatum, Bryum rubens, Bryum sauteri, Bryum violaceum, Ceratodon purpureus,
Dicranella
schreberiana, D. rufescens, Dicranella staphylina,
Didymodon
tomaculosus, Trichodon cylindricus,
Entosthodon
fascicularis, Ephemerum
minutissimum, Ephemerum serratum, Epipterygium tozeri,
Fissidens
viridulus, Fossombronia
caespitiformis, Fossombronia pusilla,
Leptodictyum
riparium, Phaeoceros laevis, Phascum cuspidatum, Pleuridium acuminatum,
P. subulatum, Pohlia melanodon, Pohlia wahlenbergii
var. wahlenbergii,
Pseudephemerum
nitidum, Tortula
viridifolia Trichostomum
brachydontium, Weissia controversa,
Riccia glauca, Riccia sorocarpa, Riccia subbifurca.
Usually also with herbaceous weeds on arable fields, e.g. Cerastium
glomeratum, Lamium
purpureum, Stellaria media, Veronica
persica.
Commonly c.fr. [most but not all records of plants
with capsules]: capsules immature 1-12; dehiscing 1-4, 6-12;
dehisced 1-12.