NEW SPECIES, NEW COMBINATIONS, AND NEW RECORDS IN CONVOLVULACEAE FOR THE FLORA OF THAILAND
First record in Thailand. The two collections seen are both in poor condition but the silky whitish hairs on the inflorescence bracts and sepals are distinctive.
Thailand.— NORTHERN: Tak [between Tak and Ban Dan Lan Hoi, ca 30 km E of Tak, dry deciduous forest, ca 200 m, 24 July 1973, G. Murata et al. T-16994 (AAU, L)]; SOUTHWESTERN: Kanchanaburi [Huai Bankan, in mixed deciduous forest, 750 m, 11 Nov. 1971, van Beusekom et al. 3673 (BISH, BKF, L)].
Argyreia kunstleri (Prain) Prain ex Ooststr., Blumea 5: 382. 1943; Hoogland, Blumea 7:
1952; Ooststr. & Hoogland, Fl. Males. 1(4): 505. 1953.— Lettsomia kunstleri Prain, J.
Asiat. Soc. Bengal 63(2,2): 100. 1894; J. As. Soc. Bengal 74 (2,2): 327. 1906.— Lettsomia curtisii Prain, J. Asiat. Soc. Bengal 63(2,2): 100. 1894; J. Asiat. Soc. Bengal 74 (2,2): 325. 1906.— Argyreia curtisii (Prain) Prain ex Ooststr., Blumea 5: 367. 1943.
First record in Thailand. The BKF specimen is in fruit and rather depauperate; it has been compared with authentic material at SING for a number of peninsular Malaysian species. It fits A. kunstleri best, given the scrappy material at hand.
Thailand.— PENINSULAR: Nakhon Si Thammarat [Khao Luang, in thicket on mountain slopes, 680–950 m, 19 Jan. 1966, Tagawa et al. T-4662 (BKF)].
D.Argyreia maingayi (C.B.Clarke) Hoogland, Blumea 7: 185. 1952; Ooststr. & Hoogland, Fl. Males. 1(4): 502. 1953.— Lettsomia maingayi C.B.Clarke in Hook.f., Fl. Brit. India 4: 195. 1883.
This is the first report of A. maingayi from Thailand. The inflorescence of the specimen has disarticulated but the shape of the sepals and the completely different indumentum on the stems, petioles, leaves, and bracts rule out A. capitiformis (Poir.) Ooststr. Argyreia maingayi is widespread and common throughout the Malay Peninsula and it is no surprise that it occurs on the Thai side of the border as well.
Thailand.— PENINSULAR: Yala [Bunnang Sata, on slope of hill in deciduous forest, 8 Dec. 1961, Suvarnakoses 1776 (BKF)].
E.Argyreia ooststroomii Hoogland, Blumea 7: 189. fig. 1, a–g. 1952; Ooststr. & Hoogland, Fl. Males. 1(4): 504. 1953.
Several collections of an Argyreia from peninsular Thailand could not be identified for some years, but eventually were compared with material in SING for peninsular Malaysian species. The Thai collections matched closely with the type specimen of A. ooststroomii, but were altogether more robust and larger in floral and fruiting parts than the type specimen. There being no other specimens of A. ooststroomii in SING (or anywhere else) for comparison, it proved impossible to assess the variability in size for this species. I could find no characters that warrant naming a distinct taxon and I here include these Thai specimens in A. ooststroomii.
Thailand.— PENINSULAR: Narathiwat [Khao Ai Ka Pok, Sukhirin, 150 m, 17 April 1996, Niyomdham & Puudjaa 4706 (BKF), Klong I-ga-daeng, Waeng, by stream in tropical