*1: Kemyel Cliff,
Mousehole, 1872, WC (OXF) (Paton 1969a:
*2: Edge of track in
old slate quarry, near St Nectan's Kieve, Tintagel, Aug. 1960,
JAP & JA (BBSUK) (Paton 1961: 150, 1969a:
Habitat notes from Cornwall are as follows.
Compressed, partly bare soil on little-used paths, path edges
and damp hollows on cliff-tops and at edge of heathland near
coast (over serpentinite), unshaded (sometimes with Riccia subbifurca).
Inland on Lizard heathland on thin unshaded soil over quarried
serpentinite rocks (with Archidium
alternifolium, Cephaloziella dentata,
'husnotii', Cladonia sp.). Thin
soil over slaty rock at unshaded edge of pathway above coastal
inlet. Usually unshaded or lightly shaded, one record (of it
persisting ?) on thin soil over gabbro rock partly shaded by
Grey Willow scrub on Lowland Point (with Bryum bornholmense, Bryum rubens, Ephemerum serratum s. l., Fossombronia
Spores often present.