*2: Rough Tor, 1907,
RWS (SLBI) (Paton 1969a:
700).
[Record from vc1 (Near Amalebra, Nancledra, 1923,
HHK (NMW), listed by Paton 1969a: 700)
deleted because it was misidentified P. killarniensis = P. bifaria (Corley 1981:
19-20)].
P.
bifaria [as P. killarniensis] was
reinstated as a separate species from P. spinulosa s. str. following the
revision by Paton (1977b). Older records for which specimens
have not been revised are placed only as P. spinulosa s.
l.
Habitat notes from Cornwall are as follows. Patches
on vertical granite and steep slate rocks with Isothecium myosuroides
var.
myosuroides on crags in shade or part-shade of deciduous
trees in valley bottom and on valley side slope. Sometimes
forming large patches (> 1 m across) on steep to vertical
sides of granitic boulders and granitic or slaty crags in
shade of deciduous woodland. Associates include Dicranum scoparium, Diplophyllum albicans,
Hypnum andoi, Isothecium myosuroides
var.
myosuroides, Lepidozia reptans, Mnium hornum, Plagiochila
asplenioides, less often Bazzania trilobata, Hymenophyllum
tunbrigense. Steep faces of granite boulders in old
'hedges' and walls including at field edge and beside lanes,
lightly shaded, N.-facing or open (associates include Diplophyllum
albicans). NW. side of Little Rough Tor, on vertical
granitic rock of damp crevice among boulders on hillside.
Unshaded steep to vertical granite of low outcrop, mainly
N.-facing, with Scapania
gracilis.
Deciduous leaves are common and likely to function
as propagules. Sporophytes unrecorded (only female plants
known in Britain).