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A CHECKLIST OF THE GENUS TARENNA GAERTN. (RUBIACEAE) IN THAILAND (W. KESONBUA & P. CHANTARANOTHAI)

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Distribution.— Peninsular Malaysia, Singapore.

Ecology.— Common in evergreen forest over limestone bedrock; altitude to 150 m. Flowering and fruiting periods: April to July.

Notes.— Tarenna curtisii is similar to T. adangensis in characters of the inflorescence and flowers, and similar to T. angustifolia in leaf shape and size. The species differs from the former in its shorter inflorescences and sulcate stigma, and differs from the latter in its shorter calyx lobes, uniovulate locules and corolla lobes with rounded apex.

7. Tarenna fragrans (Blume) Koord. & Valeton, Meded. Lands Plantentuin 59: 77. 1902 & Bijdr Boomsoort. Java 8: 75. 1902 &Atlas Baumarten von Java: fig. 535. 1915; Merr., Philipp. J. Sci. 52: 470. 1921 & Enum. Phillipp. Fl. Pl. 3: 525. 1923; Corner,WaysideTrees. 2: 652. 1940; Elm., Leafl. Philipp. Bot. 4: 1358. 1952; Backer & Bakh.f., Fl. Java. 2: 308. 1965; Wong in Ng, Tree Fl. Malaya 4: 411, 415. 1989; Keng, Concise Fl. Sing.: 161. 1990; Turner, Gard. Bull. Singapore 47: 447. 1995.—Wahlenbergia fragrans Blume, Cat. Hort. Buit.: 15. 1823. Type: Indonesia, Java, Blume 1333 (holotype L!).— Ceriscus fragrans (Blume) Nees, Flora 8: 116. 1825.— Stylocoryna fragrans (Blume) Blume, Bijdr. 9: 982. 1826; Miq., Fl. Ned. Ind. 2: 202. 1856 & Sum. Seine Pflanzenwelt: 217. 1862; King & Gamble, J.Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 72: 201. 1903; Ridl., Fl. Malay Penins 2: 109. 1923.— Webera fragrans (Blume) Hook.f., Fl. Brit. India 3: 103. 1880; F.-Vill., NovisApp.: 108. 1880; Boerl., Handl. Fl. Ned. Ind. 2(1): 129. 1891.— Chomelia fragrans (Blume) K.Schum. in Engler & Prantl, Nat. Pflanzenfam. 4(4): 74. 1891.

Thailand.— PENINSULAR: Narathiwat [Bang Kun Tong, 14 Feb. 1984, Niyomdham 776 (AAU, P), 21 Sept. 1985, Niyomdham et al. 1060 (AAU, L, P); South of Narathiwat, 8 April 1974, Larsen et al. 33078 (AAU, K), 9April 1974, Larsen et al. 33109 (AAU, BKF, L); Su Ngai Kolok, Sirindhorne Research and Nature Study Center, 20 Dec. 1993, Fukuoka & Koyama T-61927 (BKF); Su Ngai Pa Di, Phlu To Daeng forest, 31 March 2005, Kesonbua 138 (KKU); Tak Bai, Pru Ku Jum, 13April 1996, Niyomdham & Puudjaa 466 (AAU)].

Distribution.— India, Peninsular Malaysia, Singapore, Sumatra, Java, Borneo, Phillipines.

Ecology.— Scattered in swampy forest. Flowering and fruiting periods: December to April.

Vernacular.— Chan hom (´¦r®°¤) (Narathiwat).

Notes.— Tarenna fragrans is similar to T. costata in its flower, in which the corolla lobes are shorter than the tube and in having numerous ovules and seeds. It differs in having longer glabrous corolla tubes. Moeover, it is large shrub rather than a tree and the lateral veins of the elliptic leaves are indistinct on the lower surface.

8. Tarenna harmandiana Pit. in H.Lecomte, Fl. Indo-Chine 3: 213. 1923. Type: Cambodia, Pursat, Harmand 6186 (holotype P!).

Thailand.— SOUTHWESTERN: Prachuap Khiri Khan [Pranburi, 17 Aug. 1965, Phengnaren 91 (BKF); Sam RoiYot, 8 July 1926, Kerr 10898 (AAU, BK, BM, K), 2 May 1932,

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