*1: Newlyn Cliff, 1867,
WC (PNZ) (Paton 1969a: 731).
*2: Withiel, 1878, RVT
(B) (Paton 1969a: 731).
Usually occurs in small patches (low turfs), less
often as scattered plants. Habitat notes from C&S are as
follows. A colonist of damp or wet soil or drying mud (silty,
clayey or humic; mildly acidic to circumneutral; most often in
the open, but tolerating moderate to rather heavy shade at
times, e.g. under Grey Willows and at woodland edges). Records
are from soil or mud exposed in Juncus marshes, marshy
grassland (often where poached by stock), a fen, a flush in a
pasture, high on sea-cliff slopes (e.g. by path side), at
edges of streams and pools (including stream banks and dredged
mud left on them), on recently disturbed ground such as at
roadsides, and occasionally from damp to wet parts of arable
fields (including stubbles, and a bulb-field on Tresco),
rarely inside Grey Willow-carr or rather heavily shaded by
Grey Willows and trees near edge of small river. Often occurs
on otherwise bare mud; associates recorded were Pseudephemerum
nitidum, grasses, Juncus effusus and
herbs.
Doubtless somewhat under-recorded because it is
distinguishable from Entosthodon
fascicularis (q.v.) only when
well-grown capsules are present, although almost all but young
plants of P. pyriforme appear to
bear capsules. Capsules immature 3-6 [8, 10]; dehiscing 6, 7;
dehisced 8, 10.
