*1: Try Moor, N. of
Penzance, 1881, WC
(NMW) (Paton 1969a:
695).
*2: Rough Tor, 1907,
RWS (OXF) (Paton 1969a:
695).
Forming mats on acidic substrates, of peaty or
humic soil (especially on banks), rotting wood on or near the
ground, or steep granitic or slaty rocks, extending onto bark
of live trees and shrubs (recorded 1.5 m up on living oak, and
at base of Rhododendron), usually
shaded or partly shaded in woodland, groves of trees, hollows
or crevices in N.-facing banks, or in rock fissures or shaded
by boulders e.g. on north sides of tors. Often in pure
patches, associates include many common acidophiles such as Dicranum scoparium, Diplophyllum
albicans, Hypnum
jutlandicum, Mnium
hornum and Pseudotaxiphyllum
elegans, less often Calypogeia
muelleriana,
Cephalozia lunulifolia, Plagiochila
spinulosa,
Tetraphis pellucida and Hymenophyllum
tunbrigense.
Single records also from under Rhododendron scrub at
edge of old china-clay quarry, from under young trees on slope
of old china-clay spoil, and from steep grassland slope above
stream with few rocks, where sheltered but almost
unshaded.
Occasional (or frequent ?) c.fr.: capsules immature
2, 4, 5; dehiscing 4; dehisced 4, 5.