*1: Clay works beyond
Castle-an-Dinas, W. of Nancledra, 1862, WC
(PNZ) (Paton 1969a: 714).
*2: Longcoombe
Lane, Polperro, 1924, FR
(BM) (Paton 1969a:
714).
On acidic soil (humic, clayey, gritty or gravelly),
china-clay spoil, thin soil over and among rocks and on
crumbling surfaces of granitic rocks, where unshaded to
moderately shaded. Most records are from flat rocky ground,
banks, slopes or ditch sides in old or working granite and
china clay quarries, or areas of quarry spoil, but also found
on a pathside bank in open oak woodland, on low banks beside
tracks (e.g. through Grey Willow carrs), on steep banks beside
streams and on mineral or peaty substrates of ditch-banks in
mires. Nardia
scalaris and Pogonatum aloides are
frequent associates; others noted less regularly are Atrichum tenellum, Dicranella
heteromalla, Dicranella subulata,
Diplophyllum
albicans, Oligotrichum
hercynicum and Pleuridium
acuminatum.
Commonly c.fr.: capsules immature 2, 3, 5-7, 9-11;
dehisced 2-6, 9, 10.