*1: Trungle near Paul,
1860, WC (PNZ) (Paton 1969a:
728).
*2: Trehane near
Probus, 1861, ES (TRU) (Paton 1969a:
728).
S.
apocarpum s. l. here refers to the
taxon treated as S. apocarpum var. apocarpum by Smith
(1978: 309), Corley & Hill (1981: 86) and Hill et al. (1992: 338).
Blom (1996) revised this and allied taxa in Scandinavia and
recognised several additional species which also occur in
Britain. Studies of
Cornish specimens has revealed only S. crassipilum and S. apocarpum s. str. (Smith 2000:
48-49, Rothero 2004b, pers. obs.). Allocation of first records
for each vice-county mainly follows the paper by Rothero
(2004b), much older material has also been reidentified as
both segregate species.
Distinction between S. apocarpum s. str. and S. crassipilum is
sometimes difficult even with good material. Although the
mainly quadrate exothecial cells of S. apocarpum s. str. are sometimes
obviously different to the mainly elongate rectangular cells
in S. crassipilum, many
plants have patches of both quadrate and elongate cells in
different parts of the same capsule, so that it sometimes
seems rather arbitrary deciding which type predominates.
However, spore size is mainly larger in S. apocarpum s. str. (11-15(19) µm) than in S. crassipilum
((8)9-11(12) µm)
and Blom (1996: 39-40) describes several other
differences.
S. l.
commonly recorded as c.fr.: capsules immature 1-3, (4), 7,
10-12; dehiscing 2-5; dehisced [1, 2: old] 3-5, 7, 8, 10,
11.