*1: Housel Bay, Lizard
[SW71], 1916, WEN (CGE) (Nicholson 1918,
Paton 1969a: 691, 1980: 3).
*2: Nare Head, 1960,
JAP (BBSUK) (Paton 1969a: 691, 1980: 3). [An
older report (Trebarwith, 1906, EMH) is not supported by a
specimen: Paton 1969a: 691].
Most British records are from Cornwall. However,
most of the records in Isles of Scilly appear to be errors for
Riccia
subbifurca.
Habitat notes from C&S are as follows. Kynance
Farm: on small patches of mainly bare soil at edge of old
track with exposed serpentinite rocks, at base of rocky slope,
unshaded (4 June 1997: in good condition following wet weather
in preceding weeks). Chynhalls Point: on partly bare,
compressed soil on path on coastal headland, unshaded, with Archidium
alternifolium. On unshaded, compressed soil of old track
on slope above coast, with Archidium
alternifolium, Fossombronia
'husnotii', Fossombronia maritima.
On Tresco on unshaded soil of trackway in edge of daffodil
field (near Dicranella
staphylina, Riccia
subbifurca, Tortula
truncata).
Mainly grows from autumn to spring, but at least
one record of well-grown plant in late July after several
weeks of wet weather.
Commonly c.fr.: spores immature 2, ripe
2.