Enumeration of Thai Pteridophytes Collected during 1965-66

Asian tropics to Queensland, north to Japan.
In T -3430 lower reduced pinnae are more than ten in pairs and both surfaces
are almost glabrous except costae and veins.
12. Thelypteris sumatrana (v.A.v. Ros.) K. Iwats. Acta Phytotax. Geobot. 22:
101. 1967. --Cyclosorus sumatranus (v.A.v. Ros.) Ching, Bull. Fan Mem. lnst. BioI.
10: 249. 1941; HoItt. (1954) 275, (1965) 233.
NAKAWN SRITAMARAT: eastern slope of Khao Luang, mountain slope in dense
evergreen forest, alt. ca. 700 m, T -5306.
Indo-China to Malaysia through Malay Peninsula.
13. Thelypteris latipinna (Hook.) K. Iwats. Acta Phytotax. Geobot. 23: 166.
1965.--Cyclosorus latipinnus (Hook.) Tard. Notul. Syst. 7: 73. 1938; Tard. & C. Chr.
(1939-51) 397; Holtt. (1954) 276.
NAKHON NAYOK: Khao Yai National Park, rather dry ground along river in light
shade, alt. ca. 800 m, T -7384. TRANG: Khao Chong National Park, sandy slope in
light shade, alt. ca. 100 m, T -5489.
Tropics of Asia.
14. Thelypteris subelata (Baker) K. lwats. J. Jap. Bot. 38: 315. 1963; Tagawa
& K. Iwats. (1965) 80.-Cyclosorus subelatus (Baker) Ching, l.c. (1938) 224.
CHIANGRAI: interior of Ban Lang Lat, north of Doi Pacho, rather dry bank of
road in sunny place, alt. 900-1200 m, T -3438. CHIANGMAI: Doi Suthep, mountain slope
in dense forest, alt. 1000-1150 m, T -3943, T -3954; en route from Mae Klang Waterfall
to Ban Yang, on approach to Doi Inthanon, mountain slope along path in mixed
forest, alt. 350-600 m, T -2365. LOEY: Phu Kradung, dry slope along mountain path
in light shade, alt. ca. 800 m, T-399. CHANTABURI: Khao Soidao, rather dry slope
in dense mixed forest, alt. 700-1525 m, T -7197.
South China, Upper Burma and Thailand.
15. Thelypteris evoluta (Clarke) Tagawa & K. lwats. Acta Phytotax. Geobot.
22: 101. 1967.-Cyclosorus evolutus (Clarke) Ching, l.c. (1938) 219.
1275.
LOEY: north ridge of Phu Luang, dense evergreen forest, alt. 1100-1500 ill, T­
Assam and northern Thailand.
16. Thelypteris hirtisora (C. Chr.) K. Iwats. J. Jap. Bot. 38: 314. 1963.--Dryo­
pteris hirtisora C. Chr. Contr. U.S. Nat. Herb. 26: 277, 330. 1931.--Cyclosorus hirtisorus
(C. Chr.) Ching, l.c. (1938) 221.--Cyclosorus validus (Christ) Tard.; Tard. &
C. Chr. (1939-51) 398, p.p.
CHIANGRAI: interior of Ban Lang Lat, north of Doi Pacho, rather dry mountain
slope in mixed forest, alt. 900-1200 m, T -3432. CHIANGMAI: Doi Suthep, rather dry
slope in mixed forest, alt. ca. 1000 ill, T -3946, ibid., moist ground in evergreen for-
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