*1: Rosehill near
Penzance, 1918, LJC (GL) (Paton 1969a:
706).
*2: Barcelona, W. of
Looe, 1923, FR (BM) (Paton 1969a:
706).
Care is needed in recording this species in the
field, since Cololejeunea
minutissima lacking perianths can look very
similar.
Common as epiphyte on bark of trunks and branches
of Alder, Ash, Blackthorn, Grey Willow, Elder, elms, Gorse (in
scrub), Hazel, Sessile Oak, Sycamore; also recorded on Downy
Birch, Lawson's Cypress, Pinus contorta,
Rhododendron, Wild Cherry. On isolated trees and in groves,
woodland, scrub, Grey Willow-carr, sometimes in scrub on
sea-cliffs. Very often intermixed with other epiphytic
bryophytes or growing on or over them; associates include Frullania dilatata, Metzgeria violacea, Metzgeria furcata, Metzgeria
consanguinea, Hypnum andoi, Hypnum cupressiforme
var.
resupinatum, Ulota
bruchii, Ulota
crispa, Ulota
phyllantha, Zygodon
viridissimus var.
viridissimus.
One record of it growing on Hylocomium
brevirostre, itself an epiphyte on trunk of Grey Willow in
open scrub. Single record on Sitka Spruces (growing there with
many other epiphyte species). Single record among Hypnum cupressiforme
var.
resupinatum mat on boulder under deciduous trees. Once on
moribund bryophytes over granitic rock on
tor.
Female inflorescences recorded: 6, 8, 11, 12. Not
seen c.per. and not known male or c.fr.