*1: Mortar of damp
stone bridge over stream, St Mawgan, near Newquay, 1961, JAP
(BBSUK) (Blockeel 1987: 23) [reidentification
of plant previously listed as new vice-county record of Gyroweisia tenuis].
*2: On sandy mine spoil
on ledge of ruined wall below bank of mine spoil, E. of
Calstock, SX46, 1997, DTH 97-391 conf. HLKW (BBSUK,
DTH) (Rothero 1999b: 42).
Known from two (perhaps three) locations. Grows as
scattered plants, sometimes with other mosses, or forming
small low turfs. Notes on habitats in Cornwall are as follows.
At Porthmeor
Beach, St
Ives, with Didymodon
tophaceus on near-vertical sand-rock part way up low sea
cliff above beach (near Soleirolia
soleirolii). At Okeltor Mine (near Calstock, vc2) forms
extensive low lawns or deeper patches on horizontal or sloping
silty soil (old mine-spoil) on tops and ledges of ruined walls
of mine-buildings, unshaded to partly shaded. Although often
in pure patches, its closer associates include Bryoerythrophyllum
recurvirostrum,
Bryum pallescens and Cephaloziella
integerrima.
Gemmae seen in Cornish specimens from Porthmeor.
Not seen c.fr. Unlike most British populations, the Okeltor
plants are apparently male (H.L.K. Whitehouse in litt.) but no
antheridia have been seen.
At St Mawgan (vc1) what may be this species grows
sparsely on damp mortar in crevices of old mortared-stone
bridge-wall over river, partly shaded by trees. All material
seen from this locality is intermixed with Gyroweisia tenuis and
the characteristic protonemal gemmae of the latter species are
plentiful. Although vouchers and other specimens were
reexamined and redetermined as L. berica by MOH and
HLKW in 1998, DTH retains doubts whether this population
consists only of G. tenuis with unusually
attenuate perichaetial leaves (see account of that species).
Other associates found there include Didymodon
tophaceus.
