*1: Cliff path, N. side of Maen Porth [SW79-29-],
1963, JAP 789 & 790, det. DTH (DTH) (Holyoak 2003a:
*2: Bodmin, 1893 and 1897, RVT det. DTH (B) (Holyoak 2003a:
62) [the same specimens were listed as A. muticum var. minus by Perry 1967:
412, Paton 1969: 723].
The taxonomic treatment of A. mediterraneum has
varied. Hill (1982) first recognised it in Britain, but he
treated it as a synonym of A. muticum; SÚrgio
(1972), T.L. Blockeel (in Hill et al. 1992: 257) and
Zander (1993: 279) afforded it varietal rank; whereas
Stone(1988: 265) and Hill et al. (2008) treated
it as a distinct species.
It is a little-known taxon for which 7 of the 11
British records are in Cornwall. Habitat data from Cornwall
are as follows. Lizard pen., Vc1: on partly bare, moist earth
at edge of wet track (with Trichodon cylindricus,
nitidum). N. of Porthtowan (atypical, with short spines on
spores): small bare patch of compressed, moist soil on path on
coastal heath (near Bryum dichotomum). S.
of Portscatho: partly bare, thin, unshaded soil on top of
'hedge' near cliff top (close to Weissia
multicapsularis). Near Trefusis Point: soil patches in
grassland (near gorse scrub) on steep, cattle-trodden,
S-facing hillside (with Bryum dichotomum, Bryum rubens, Ephemerum
minutissimum, Pleuridium acuminatum,
Tortula truncata Trichodon
cylindricus). Talland, vc2: thin unshaded soil over low
slaty rocks of bank in coastal pasture.
All records c.fr.: capsules immature 1, 10, 11;
mature 1, 11.