Photo
by Dr M Lueth ©.
*1: Granite boulders in
old china clay quarry, Tresoweshill W. of Helston, 1965, JAP
(BBSUK) (Paton 1966: 184, 1969a: 699), as M.
ustulata.
*2: China clay waste,
Carbis Moor, N. of St Austell, 1970 (BBSUK)
(Paton 1971: 372), as M.
ustulata.
Mostly recorded in and near old and working
china-clay pits, also a granite quarry. A colonist, occurring
in patches on clayey to gravelly substrates on banks and flat
ground, unshaded or at most lightly shaded; also on inclined
to horizontal surfaces of granitic boulders and other rock,
especially where crumbling and soft at surface (with Marsupella profunda,
Nardia scalaris, Pogonatum urnigerum,
less often Cephaloziella
divaricata, Marsupella emarginata
var.
emarginata).
Two records away from china-clay workings as
follows. Small patch on thin gritty soil over sloping granitic
rock of large boulder in quarry, almost unshaded, with Cephaloziella
divaricata, Ditrichum
heteromallum, Nardia scalaris, Pogonatum urnigerum.
Single small patch on granitic boulders in mine-spoil on
N.-facing hillside, almost unshaded, near Marsupella emarginata
var.
emarginata.
Commonly cfr; capsules immature 1-3, 11, 12;
dehiscing 1, 3, 12; dehisced 3.
