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THAI FOREST BULLETIN (BOTANY) 36

2. Tarenna angustifolia (King) Merr., Philipp. J. Sci. 17: 472. 1920; Craib, Fl. Siam. 2: 88. 1932; Wong in Ng, Tree Fl. Malaya 4: 412, 414. 1989; Turner, Gard. Bull. Singapore 47: 447. 1995.— Stylocoryna angustifolia King, J.Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 72: 199. 1903; Ridl., Fl. Malay Penins. 2: 108. 1923. Type: Malaysia, Perak, April 1885, King 8265 (holotype K!;

isotype SING!).

Thailand.— PENINSULAR: Surat Thani [Khlong Phanom National Park, 18 April 2005, Kesonbua 165 (KKU)]; Phangnga [Takua Thung, Khao Phing Kan, without date, Shimizu, Konta, Wongprasert & Sangkhachand T-29214 (BKF)]; Krabi [Ko Phi Phi Le, 10 April 1930, Kerr 18925 (BK, BM); Muang, Wat Tham Suea, 23 Oct. 2004, Kesonbua 124 (KKU) & 21 March 2006, Kesonbua 180 (KKU); Nopphrat Tara beach (Ko Noi), 23 Oct. 2004, Kesonbua 126 (KKU); Sra Morakot Wildlife Sanctuary, 10 April 2003, Middleton, Lindsay & Pooma 2099 (BKF)]; Nakhon Si Thammarat [Thung Song, Khao Chem, 21 July 1929, Rabil 130 (BK, BM)]; Satun [Tarutao Island, 21 April 1969, Chermsiriwathana & Kasem 1476 (BK)].

Distribution.— Peninsular Malaysia, Singapore, Philippines.

Ecology.— Common in evergreen forest, on limestone bedrock in the peninsula; altitude to 150 m. Flowering and fruiting periods: March to October.

Notes.— Tarenna angustifolia varies considerably: the upper surface of leaf is usually glabrous, but often there are sparse hairs or microscopic hairs on the lower surface, whereas some specimens have only sparsely distributed hairs on the leaf veins. The leaf shape varies from ovate or lanceolate to broadly elliptic. The inflorescence branches are short with dense flowers and the ovary has a few ovules per locule.

3. Tarenna cinerea Craib, Fl. Siam. 2: 88. 1932. Type: Thailand, Surat Thani, Nawng Wai, 8 March 1927, Kerr 12283 (holotype K!; isotypes BK!, BM!).— T. pubescens Craib, Fl. Siam. 2: 94. 1932, synon. nov. Type: Thailand, Prachuap Khiri Khan, Pak Tawan, 29 July 1931, Kerr 20516 (holotype K!; isotypes BK!, BM!).

Thailand.— NORTHEASTERN: Loei [Wang Sa Phung, 17 March 1927, Kerr 1345 (BK)]; SOUTHWESTERN: Prachuap Khiri Khan [Bang Saphan, 24 Dec. 1927, Kerr 8192 (K), without date, Put 1345 (BM, K); Pak Tawan, 29 July 1931, Kerr 20516 (BK, BM, TCD, K)]; PENINSULAR: Chumphon [Lang Suan, Tako, 13 June 1928, Put 1635 (BK, BM)]; Surat Thani [Nong Wai, 8 March 1928, Kerr 12283 (BK, BM, K)].

Distribution.— Endemic to Thailand.

Ecology.— Scattered on rocky limestone hills in evergreen forest; altitude 100–300 m. Flowering and fruiting periods: December to July.

Notes.— Tarenna cinerea can be distinguished by the elliptic leaves which are glossy on the upper surface and pubescent on the lower surface, the calyx lobes are broadly triangular and the ovary is densely covered with hairs.

4. Tarenna collinsae Craib, Bull. Misc. Inform., Kew 1915: 430. 1915 & Fl. Siam. 2: 89. 1932; Pit. in H.Lecomte, Fl. Indo-Chine 3: 220. 1923; P.H.Hô, Câyco Viêtnam 3, 1: 228, fig. 7673. 1993. Type: Thailand, Chon Buri, Sriracha, 1 July 1913, Collins 120 (holotype K!).— T.

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