Enumeration of Thai Pteridophytes Collected during 1965-66

T-2649.
Tagawa and Iwatsuki: Enumeration of Thai pteridophytes
Ceylon, India to South China, Taiwan, Tonkin, Laos, North Thailand and the
Philippines.
6. Microsorium dilatatum (Bedd.) Sledge, Bull. Brit. Mus. (Nat. Hist.) Bot. 2:
143.1960, excl. syn. Polypodium hancockii Baker.--Polypodium dilatatum Wall. ex Hook.
Sp. Fil. 5: 85. 1863, non Hoffm. 1796.--Pleopeltis dilatatum Bedd. Ferns Brit. Ind.
t. 122. 1866. --Polypodium euryphyllum C. Chr. Ind. Fil. 525. 1906.--Microsorium
hancockii Ching, l.c. (1933) 309, p.p.
CHIANGRAI: northern slope of Doi Pacho, muddy rock along stream in dense for­
est, alt, 1350-1800 m, T -3692. CHIANGMAI: Doi Inthanon, wet sandy ground by
stream in dense forest, alt. 1350-1900 m, T -2664. LOEY: north ridge of Phu Luang,
muddy rock by stream in dense forest, alt. 1100-1500 ill, T -1301. CHANTABURI: Khao
Soidao, muddy rock in forest at ridge, alt. 700-1525 m, T -7172. NAKAwN SRITAMA­
RAT: eastern slope of Khao Luang, wet rock along stream in dense evergreen forest,
alt. ca. 700 m, T -5276.
Malaya.
Ceylon, North India to Southwest China, south to Indo-China, Thailand and
Microsorium dilatatum has been confused with M. hancockii (Baker) Ching, but is
distinct from the latter in having much larger fronds with more numerous pinnae
and the stipe and rachis distinctly edged on the back.
7. Microsorium pteropus (Blume) Copel. I.e. (1929) 112; Ching, l.c. (1933) 312;
Tard. & C. Chr. (1939-51) 484; Holtt. (1954) 172, (1965) 230; Tagawa & K. Iwats.
(1965) 77.
PHITSANULOK: Tung Salaeng Luang National Park, wet mossy rock by stream in
light shade, alt. 300-600 m, T -2022. LOEY: from Ban Na Luang to north ridge of
Phu Luang, muddy rock by stream in mixed forest, alt. ca. 800 ill, T -1090. NAKHoN
NAYOK: Khao Yai National Park, muddy rock in stream bed in light shade, alt. ca.
800 m, T -740l.
India generally, east to South China and Taiwan, south to Malaysia.
8. Microsorium cuspidatum (Don) Tagawa in Hara, Flora East. Himal. 495.
1966.--Phymatodes cuspidata (Don) J. Smith; Alston & Bonner, Candollea 15: 206.
1956.--Phymatodes lucida (Roxb.) Ching, Contr. Inst. Bot. Nat. Acad. Peiping 2: 6l.
1933; Tard. & C. Chr. (1939-51) 475.
LOEY: from Ban Na Luang to north ridge of Phu Luang, tree trunk in dense
forest, alt. ca. 1000 m, T -1085; Phu Kradung, rather dry rock in mixed forest, alt.
ca. 1000 m, T -388.
North India, South China, Burma, Laos and Tonkin, and northeastern Thailand.
9. Microsorium rubidum (Kunze) Copel. Gen. Fil. 197. 1947.--Phymatodes lon-
- 53- 53