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Photo
by Dr M Lueth ©.
*1: Between Mousehole and Lamorna, 1844, AG (PNZ) (Paton 1969a:
721-722).
*2: Withiel, 1874, RVT (B) (Paton 1969a:
721-722). [Earlier report (St John near Torpoint, EMH,
in Holmes & Brent 1869) not supported by specimen: Paton
1969a: 721-722].
Grows as scattered plants, in low patches or
forming dense low lawns. Notes on habitats in C&S are as
follows. On partly bare humic, rocky and sandy soil (acid to
basic) on sea-cliffs and slopes, banks or 'hedges' above them,
and on low creekside cliffs; on free-draining substrates,
often on thin soil over rocks (including slaty, granitic, or
serpentinite lithologies); mainly in unshaded sites (but
sometimes in small shady hollows or partly or lightly shaded
by grasses, herbs or steep banks; once part shaded by woodland
edge and overhangs), often in exposed places. Single records
from thin soil over edge of old concrete of ruined mine
structure and over top of old mortared wall near mine. Nearly
all sites are on sea-cliffs or close to them, recorded up to
200 m inland near Gwithian and near Padstow (on 'hedges' and
on rocky bank) and ca 300 m inland on
Samson, Isles of Scilly (on crumbling wall). Some sites are
low on exposed sea-cliffs where they receive much salt-spray
(e.g. at Pendeen Watch and in Isles of Scilly). Associates
recorded include Archidium
alternifolium,
Bryum dichotomum,
B. capillare, Kindbergia
praelonga, Hypnum
cupressiforme var.
resupinatum,
Scleropodium touretii, Tortella
flavovirens,
Trichostomum brachydontium, Weissia controversa
var. controversa,
Sedum anglicum;
less often Cephaloziella
divaricata, Hypnum
cupressiforme var.
lacunosum, Lophozia
bicrenata,
Polytrichum juniperinum, Tortula canescens, T. cuneifolia, T. truncata and T.
wilsonii.
Commonly c.fr. [most but not all records are of
plants with capsules]: capsules immature 1-4, 11, 12;
dehiscing 10, 11, 1-4; dehisced 1-4, 6.
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