*1: Stone in stream in
woods near Gweek, Helston, May 1962, JAP
(BBSUK) (Warburg 1963b: 493, Paton 1969a:
713).
*2: Rocks beside
stream, Lesnewth near Boscastle, Aug. 1961, JAP
(BBSUK) (Warburg 1964: 723, Paton 1969a:
713).
A rather rare moss that is usually clearly distinct
from congeners in its greatly thickened leaf border, but a few
gatherings seem to form a link with F. bryoides var. caespitans. Grows as
lawns or scattered plants. Habitat notes from Cornwall are as
follows. On rocks (slaty or granitic), occasionally masonry
(of bridge) or firm soil, on vertical to horizontal
substrates. Occurs shallowly submerged to just above
water-level (up to ca 12 cm above water;
within flood-zone) of clean streams, the sites being shaded or
partly shaded, mainly by deciduous woodland. One site is in
small stream on exposed coastal slope. Close associates are
often lacking, but can include Chiloscyphus
polyanthos, Dumortiera hirsuta; Fissidens bryoides
var. caespitans
grows close to it at some sites.
Capsules apparently frequent: immature 4, 10,
dehisced 3, 5.
