*2: Rocks in stream,
woods above East Castick, near North Hill, May 1961,
JAP (BBSUK) (Warburg 1962: 375, Paton 1969a:
750).
Habitat notes from Cornwall are as follows.
Patches, often extensive, on tops and sides of granitic
boulders mainly within 0.5-1.0 m above normal water-level of
rivers, almost unshaded to partly shaded by deciduous
woodlands. Often in pure patches, associates include Hyocium armoricum, Racomitrium
acicularec,
Thamnobryum alopecurum. Beside R. Tamar on near-horizontal
hard slaty rocks high in flood-zone, lightly shaded by
deciduous trees.
Occasionally c.fr.: capsules immature 12, dehiscing
2.
