*1: Near Camborne,
1861, WC (PNZ) (Paton 1969a:
754).
*2: Trehane near
Probus, 1858, ES (TRU) (Paton 1969a:
754).
Plants intermediate between P. succulentum and P. nemorale occur in
Cornwall as elsewhere in Britain and
Ireland. A proportion of the intermediate plants have some
leaves on different branches of the same plant showing
characters of each species. However, the extreme forms seem
rather distinct and most gatherings can be assigned to one or
the other taxon even if this appears somewhat arbitrary.
Doubts thus remain about their taxonomic
distinctness.
Habitat notes from C&S are as follows. Steep
soil (or soil over or among rocks) on stream and other banks
or slopes in deciduous woodland and groves and in Grey Willow
scrub. Associates include Brachythecium
rivulare,
Cirriphyllum piliferum, Kindbergia
praelonga,
Fissidens bryoides var. bryoides, Hookeria lucens, Lophocolea
bidentata, Mnium
hornum,
Plagiothecium nemorale, and herbs and grasses (e.g. Geranium
robertianum,
Valeriana officinalis, Viola riviniana).
Soil on laneside banks and sides of 'hedges', usually at least
partly shaded, e.g. by scrub or trees. Sheltered and shaded
soil among granitic rocks below tor. Soil in Grey Willow scrub
beside disused china-clay pit. With other bryophytes on damp
shaded walls. Thin soil on ledges over flushed granite on
upper part of sea cliff, almost unshaded. Soil beside path
through scrub above sea-cliff. On peaty plant litter on
flushed slope on N.-facing sea-cliff. Unusual record of
patches ca 2 m
above ground on mossy tree trunk beside lane (with Hypnum
andoi).
Occasional/frequent c.fr.: capsules immature 2, 3,
5, 6; dehiscing 2, 8; dehisced 3, 11.
