*1:Mousehole
Cave, c.fr., 1840, JR
(Greenwood 1844) and 1843, AG
(PNZ) (Paton 1969a: 745,
given in parentheses because there were no recent
records).
+1: Steep granitic rock
inside sea-cave, trickling with water, S. of Mousehole, SW42,
1996, DTH 96-261 (BBSUK, DTH) (Blockeel 1997:
45).
Known from one small area in vc1, with records
restricted to single site for past century (the only locality
in England). Recorded
at single site well inside a sea-cave near Mousehole, where
the single patch known had maximum dimensions of 58 cm high by
38 cm wide in 1997. It is on granitic rock forming the north
wall of the cave, on the near-vertical surface of a shallow
groove that is trickling with water, in a location partly
shielded from the exterior, so in rather weak
light.
The only plants in contact with it are Conocephalum conicum
(which surrounds it on one side) and a few stems of Plagiothecium
nemorale. Vegetation on ledges nearby is mostly of nearly
pure stands of Agrostis
stolonifera or of Osmunda regalis; other
species present in lesser amounts nearby on the ledges or on
steep rock are Fissidens
adianthoides, F. polyphyllus, Oxyrrhynchium hians, Trichostomum
brachydontium, Samolus valerandi
and Scrophularia
nodosa.
One record c.fr.: capsules immature [9] (several
sporophytes on 30 Sep. 1997, immature, but with elongated
setas).
