First vice-county records of H. heteropterum s.
l.:
*1: Lamorna, 1844, AG
(PNZ) (Paton 1969a:
745).
*2: Helman Tor, 1879,
RVT (B) (Paton 1969a:
745).
H.
wulfsbergii was not generally
recognised as distinct by British bryologists until the
studies by A.C. Crundwell beginning in 1995 (see Crundwell
& Smith 2000). Only material revised during these studies
or recorded subsequently is referred to H.
heteropterum
var. heteropterum
and H.
wulfsbergii
; older records of these are
listed here as H. heteropterum s. l.; older records of H.
heteropterum
var. flaccidum
should be reliable.
Forms patches (low mats), often pure, or grows
mixed with other bryophytes. Notes on habitats in Cornwall are
as follows. An acidophile, usually found on rocks (granitic,
slate, serpentinite; often on steep or overhung surfaces of
crags but also on tops of boulders) or thin soil over rocks,
less often firm soil, in humid or damp places, sometimes on
intermittently flushed rocks. Commonly grows in moderate to
heavy shade in deciduous woodland and usually in sheltered
places, but occasionally unshaded or almost so on hillsides or
tors. Recorded from stream banks (sometimes at water's edge or
in flood-zone but more often above it; typically in woodland),
tors (often in crevices), other crags, old quarries, entrances
to mine adits and on laneside banks. Associates recorded
include Diplophyllum
albicans,
Kindbergia praelonga, Fissidens bryoides
var.
caespitans,
Lejeunea lamacerina, Metzgeria furcata, Rhizomnium punctatum,
Saccogyna
viticulosa, less often Fissidens polyphyllus, and
Trichostomum
tenuirostre.
Not seen c.fr.
