*1: Hayle Sands, 1861,
WC (PNZ) (Paton 1969a:
746).
*2: Near Probus, 1861,
ES (TRU) (Paton 1969a:
746).
Habitat notes from Cornwall are as follows. On
calcareous masonry (including mortar and concrete), especially
where damp or wet, e.g. on edges of concrete roads, on and
near damp walls (e.g. of bridges, viaducts, pond edges and
ruins), on and around debris of dumped masonry, on soil (often
thin stony or gravelly soil) of paths and tracks, gravel car
parks, in gardens and churchyards, in open or lightly shaded,
occasionally in moderate shade. Many associates, often include
Barbula convoluta,
Barbula
unguiculata, Bryum
dichotomum,
Calliergonella cuspidata, Didymodon
insulanus,
Didymodon nicholsonii, Eucladium
verticillatum,
Oxyrrhynchium hians, Kindbergia praelonga,
Pellia
endiviifolia,
Rhynchostegium confertum. Plentiful on sparsely vegetated
damp calcareous sand in floor of old sand pit at landward edge
of dunes (with Aneura
pinguis, Bryum
pseudotriquetrum, Brachythecium
rivulare,
Calliergonella cuspidata, Drepanocladus
aduncus,
Petalophyllum ralfsii). Alone or on algae and with other
bryophytes on serpentinite and slaty rocks or firm soil in
very shallow water, dripping or trickling water on banks, a
road-cutting, in edges or flood zone of streams, in open or
lightly to part shaded in deciduous woodland On granitic
boulder and slaty rocks at or just above water-level in small
streams, often in shade of trees. On rock at base of sea-cliff
of mica-schist granulite (Porthallow). On earthy copper-mine
spoil, unshaded or lightly shaded. On dumped masonry in old
mining area and on china clay sites, unshaded. In small
quantity on old unshaded tarmac. On wet, flushed bank at edge
of stream in fenny area on Lizard pen. heath. In flushes and
at stream edges on slopes above sea-cliffs. In open damp
hollows in grassland on old landfill site. Sometimes forms
large pure patches on flushed slaty rocks in old quarries
inland and near coast, and road-cuttings (associated with Conocephalum conicum,
Eucladium
verticillatum, Fissidens
adianthoides, Pellia endiviifolia,
Thamnobryum
alopecurum). Plentiful on serpentinite low in
inundation-zone of large stream (Poltesco). In short
vegetation of calcareous dune-slack. Unusual records from old
tarmac of lane, and of patch on damp old timber of unshaded
seat beside reservoir, growing close to mortared
masonry.
Two records c.fr. (both records of plants on rock
in streams, vc1 and vc2): capsules dehiscing
5.