*1: Mousehole, 1861, ES
(TRU) (Paton 1969a: 714).
*2: Pencarrow Wood,
Bodmin, 1891, RVT (BM) (Paton 1969a:
714).
Habitat notes from Cornwall are as follows. Usually
in patches (often pure) on granitic rock and firm soil of
stream or river banks from just above water-level to ca 1.5 m above it,
preferring steeply inclined, vertical and slightly overhanging
surfaces and sheltered humid hollows, nearly all sites being
partly to well shaded by trees (often in or at edges of old
woodland) and some are heavily shaded in holes. At Mousehole
small plants grow on near-vertical granitic rock, with
trickling water, in shade well inside a sea cave; Cyclodictyon
laetevirens and Conocephalum conicum
grow nearby. In Hendergrove Wood also in damp sheltered
hollows among shaded granitic rocks on hillside far above
stream inside deciduous woodland (sometimes near Hymenophyllum
wilsonii). At Dozmary Pool it grows submerged on rocks in
shallow water at edge of lake (leg. RJM, in
DTH). Unusual record from above
Clapper
Bridge
(SX17I) of three strong patches (largest 30 cm) on vertical
concrete of enclosed sluice near river, just above water level
and rather heavily shaded. Another atypical record of small
but established patch on part-shaded soil of steep bank in
woodland many metres above R. Camel. Associates recorded: Calypogeia arguta, Cephalozia
bicuspidata, Fissidens bryoides
var.
caespitans, Heterocladium heteropterum
var. heteropterum, Mnium hornum, Rhizomnium punctatum,
Trichostomum
tenuirostre.
Not seen c.fr. [only male plants reported in
British Is.: A.J.E. Smith in Hill et al. 1992:
204].