Monographs Details: Campylopus serratus Sande Lac.
Authority: Buck, William R. 1987. Bryostephane Steereana: A Collection of Bryological Papers Presented to William Campbell Steere On The Occasion of His 80th Birthday. Mem. New York Bot. Gard. 45: 1-749.
Description:Distribution and Ecology - Distribution: Thailand, peninsular Malaysia and Bomeo (Fig. 96).Ecology: Campylopus serratus is the only species ofthe genus to occur at low elevations in Malaysia. The other species of the genus mostly occur above 800 m. The present species has been collected from sealevel to 1100 m but the majority of the collections come mostly from below 200 m. It occurs on exposed or semi-exposed, moist sandy or peat soils.
Johnson (1962) published a note on the widespread
occurrence of a sand-binding moss on the
east coast of Malaya and she had identified the
species as Racelopus pilifer. Touw (1986) expressed
doubt about the identity of this species.
Johnson did not mention any voucher specimen
and in addition, the figures given in the paper
are not helpful in confirming the identity of this
species. However, there are three specimens collected
by Johnson (4021, 4023 and 4026) at KLU
and identified by her as Racelopus pilifer. These
specimens collected on the east coast of Malaya
are in fact C serratus. W e have not been able to
see other specimens identified as R. pilifer by
Campylopus serratus is related to C. savannarum
(C. Müll.) Mitt., a pantropical species,
which has recently been recorded from Southeast
Asia (Frahm, 1984b, 1985; Hegewald & van
Zanten, 1986). The present species differs only
in the lack of a border of quadrate cells at the
basal leaf margin, which is replaced by two rows
of hyaline narrow rectangular cells. Thus C. serratus
may be interpreted as geographical vicariant
race of C. savannarum in Southeast Asia,
probably developed as a result of isolation by the
breaking of the Gondwana plate. Such similar
relationships are also found in the species pairs
C. fragilis-crispifolius and C. flexuosus-comosus.