Enumeration of Thai Pteridophytes Collected during 1965-66

TagawCl and Iwatsuki : Enumeration of Thai pteridophqes
2. Meringium denticulatum (Sw.) Capel. l.c. (1938) 42.--HY1fwnophyllurn dell­
ticulatum Sw.; Capel. l.c. (1937) 41; Tard. & C. Chr. (1939-51) 57; Holtt. (1954) 79.
NAKAwN SRITAMARAT: Khao Luang, mossy tree trunk in dense forest at ridge,
alt. 1100-1786 m, T-4814, ibid., muddy rock in dense evergreen forest, alt. 1100-1786m,
T -4816 bis.
Ceylon and North India through Malaysia to Fiji, north to the Ryukyus.
3. Meringium acanthoides (van den Bosch) Capel. l.c. (1938) 42.--Hymenophyl­
lzun acanthoides (van den Bosch) Rosenst.; Capel. I.c. (1937) 45; Holtt. (1954) 80.
NAKAwN SRITAMARAT: Khao Luang, moist rock in wet place in dense evergreen
forest, alt. 680-950 m, T -4634.
Java to New Guinea, north to the Malay Peninsula and Taiwan.
Hymenophyllum Sm.
1. Hymenophyllum barbatum (van den Bosch) Baker, Syn. Fil. 68. 1867; Capel.
l.c. (1937) 84.--Hyrnenophyllurn poilanei Tard. & C. Chr., H. oxyodon Baker & H.
khasianzun Baker; Tard. & C. Chr. (1939-51) 57, 58.
CHIANGMAI: Doi Inthanon, muddy rock in deep forest, alt. ca. 1400 m, T -2670,
T -2673, ibid., mossy tree trunk in dense forest, alt. 1350-1900 m, T -2671. LOEY:
northeastern ridge of Phu Luang, mossy tree trunk in dense forest, alt. 1300-1567 m,
T -1502. CHANTABURI: Khao Soidao, mossy tree trunk in dense forest at ridge, alt.
700-1525 m, T -7161 bis.
North India to Japan, south to Taiwan, Annam and Southeast Thailand.
The above localities in Thailand stand at the southernmost part of this species
ever known. The materials cited above differ a little from the Japanese plants in
such characters as: the axes of fronds densely and persistently hairy, the teeth on
segments larger, the internal cell walls of the laminar part thick and wavy, and
the receptacles lengthened to some extent. We are not certain whether it is correct
or not to refer our materials to such a variable species, but at present they may
better be placed tentatively in H. barbatum.
Mecodium Presl
1. Mecodium polyanthos (Sw.) Capel. l.c. (1938) 19.--Hymenophyllz£1rt poly­
anthos Sw. ; Capel. l.c. (1937) 97; Tard. & C. Chr. (1939-51) 54; Holtt. (1954) 81, (1961)
17, (1965) 229.
CHIANGMAI: Doi Chiangdao, mossy tree trunk in dense mixed forest, alt. 1600­
2100 m, T-4218; higher elevation of Doi Suthep (Doi Pui), mossy tree trunk in
dense forest, alt. 1100-1685 m, T-3189; Doi Inthanon, muddy rock in dense forest,
alt. 1350-1900 m, T-2653. LOEY: north ridge of Phu Luang, muddy rock by stream
in dense forest, alt. 1100-1500 m, T -1282, T -1293; Phu Kradung, mossy cliff along
stream in forest, alt. ca. 1200 m, T -631, T -650, ibid., muddy rock along stream in
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