*1: Lamorna, 1922, JBD
(Hb JBD) (Paton 1969a: 715).
*2: Fowey, 1926, FR
(BM) (Paton 1969a:
715).
The character given in Smith's (2006) Flora for separation
from Trichodon
cylindricus is unreliable: this species may also have
teeth all around subula, but its leaf apex is wider than in
that species.
Habitat notes from Cornwall are as follows. A
colonist of disturbed soil (loamy, silty, clayey or gritty)
that varies from mildly acidic to basic, in sites that are
damp to rather dry. Although usually in sites that are
unshaded or lightly shaded, it sometimes tolerates
considerable shade. Typical habitats include arable fields
(cereals and their stubble, flax, brassicas, flowers, beans,
grass-leys), gardens, partly bare patches in grasslands or
marshes, soil heaps, banks and slopes, roadside verges and
lay-bys, woodland rides, woodland edges and clearings, stream
and river banks, churchyards, on and beside tracks, edge of
gravel car park, mud dredged from ditches, and dried mud of
pools and reservoirs. Occasionally also on old mine-spoil, and
recorded on unshaded bank on coast and on slope of sea-cliff
where partly shaded by bushes. On sediment exposed in
inundation zone beside Upper
Tamar Lake. Common associates
include other mosses that colonise bare soil, especially Barbula convoluta, Barbula unguiculata,
Bryum dichotomum, Bryum rubens, Dicranella staphylina,
Dicranella varia,
Trichodon
cylindricus, Fossombronia pusilla,
Phaeoceros laevis,
Pohlia melanodon, Riccia glauca, Riccia sorocarpa, Riccia subbifurca, Phascum cuspidatum and
Tortula truncata,
less often Anthoceros
agrestis, Bryum
dichotomum, Pleuridium subulatum.
Rhizoidal tubers probably common/regular, but not
often checked. Occasionally/frequently c.fr. (seven records):
capsules immature 3, 8, 9, 11; dehiscing 3, 11; dehisced 1,
3.