Photo
by Dr M Lueth ©.
*1: Restronguet Hill,
Mylor, 1839, EAW (TRU) (Paton
1969a: 713).
*2: Polperro, 1920, FR
(EXR) (Paton 1969a:
713).
See
note under F.
dubius regarding occurrence of plants intermediate between
F. adianthoides and
that species. Like the
latter species, F. adianthoides occurs
on varied substrates in a wide range of habitats, most of them
at least slightly basic. Although there is considerable
overlap in their preferences, F. adianthoides often
occurs on wetter substrates than those with F. dubius, notably in
wet heathland. Its records can be divided into the following
groups of substrate/habitat types:
(1) Frequent on calcareous sandy soil of fixed
dunes and in dune-slacks; usually
unshaded.
(2) Occasional on soil on cliff-slopes. Also found
once on thin soil over slaty rock close to a small waterfall
where partly shaded by deciduous woodland. Once on soil at
base of concrete wall.
(3) Directly on rocks (slaty, granitic,
serpentinite) and old concrete or wall-mortar, often near
water and frequently where surfaces are running with water or
receiving spray from waterfalls (the plants then sometimes
very large). Sites may be unshaded to rather heavily shaded
(e.g. under trees, in old quarries, in old railway cutting and
at entrance to mine adit).
(4) In short to rather long vegetation of wet
heaths and other marshy places, especially over serpentinite
on Lizard pen. It may grow almost unshaded or heavily shaded
at bases of tall tussocks of Molinia caerulea and
Schoenus nigricans.
Also in similar habitats in flushes on sea-cliffs and once
seen growing as extensive lawns on thin film of moist clay
under Calluna
vulgaris on floors of old china-clay settling
tanks.
Associates recorded include Bryum pseudotriquetrum
var.
pseudotriquetrum, Conocephalum conicum
s. str., Cratoneuron filicinum,
Eucladium
verticillatum, Pellia endiviifolia,
Saccogyna
viticulosa, Thamnobryum
alopecurum, Trichostomum
brachydontium.
Frequently (or commonly) c.fr.: capsules immature
1, 2, 8, 10-12; dehiscing 11, 1-4; dehisced
3-6.