*1: Lelant Sands, 1867,
WC (PNZ) (Paton 1969a:
724).
*2: On film of clay on
damp concrete wall at old china-clay works, W. of Pont's Mill,
SX05, 1997, DTH 97-445 (BBSUK) (Rothero
1999b: 42).
Perhaps better treated as a var. or subsp. of D. fallax (as it was
e.g. by Wigginton 1995: 69), because forms apparently
intermediate between them are not rare in Cornwall (e.g.
DTH 98-78).
Grows as low lawns, or more sparsely as patches or
intermixed with other low mosses. Notes on habitats in
Cornwall are as follows. A calciphile of unshaded habitats.
Most common on calcareous sand of fixed dunes and edges of
dune-slacks, in very low turf or with other low mosses, and in
similar habitats where blown sand rests on hillslopes.
Scattered records also from thin/compressed soil of old paths
and tracks (over serpentinite and gabbro on Lizard pen.,
especially near quarries, and on old mining ground elsewhere
in vc1), a gravel car park, clay soil receiving drainage from
old concrete, and thin soil overlying old concrete (on ruined
mine buildings; also once each on a vertical damp wall of ruin
of china-clay 'dry', and on disused railway station platform).
Single finds also: on soil dumped on top of 'hedge'; growing
directly on weathered old concrete of ruin; in open part of
basic flush above sea-cliffs. Associates recorded include Bryum dichotomum, Dicranella varia, Didymodon fallax, D.
insulanus.
No vegetative propagules recorded. Not seen
c.fr.
