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THAI FOREST BULLETIN (BOTANY) 36

Ixora longifolia is illegitimate and therefore cannot function as a basionym. Therefore the first available validly published name has been used.

14. Tarenna membranacea Pit. in H. Lecomte, Fl. Indo-Chine 3(2): 215. 1923; P.H. Hô, Câyco Viêtnam 3, 1: 229, fig. 7677. 1993. Type: Vietnam, Cochinchine, March 1877, Pierre 3168 (holotype P!; isotype K!).

Thailand.— EASTERN: Nakhon Ratchasima [KhaoYai National Park, 17 March 1965, Kasem 423 (BK), 19 July 1973, Murata, Fukuoka & Phengklai T-16293 (AAU, BKF, L)]; SOUTHWESTERN: Kanchanaburi [Wangka, Kerr 10463 (K)]; Phetchaburi [Kaeng Krachan National Park, 11 Dec. 2002, Middleton, Suddee & Hemrat 1543 (K)]; Prachuap Khiri Khan [Tap Sakae, HuaiYang Waterfall, 25Aug. 2002, Middleton, Suddee & Hemrat 1303, Herb. of Biology Dept., Chiang Mai University, 7 Oct. 1930, Put 3241 (AAU, K), 7 Feb. 1970, van Beusekom & Santisuk 2697 (AAU, BKF, L, P)]; CENTRAL: Saraburi [Muak Lek, 28 April 1922, Marcan 780 (BM); Sam Lan forest, 1 April 1974, Maxwell 74–256 (AAU, BK); Hin Lap, 9 Aug. 1929, Put 2407 (AAU, BK, K, L)]; SOUTHEASTERN: Chanthaburi [Pong Nam Ron, Pa Rawang, 8 Oct. 1955, Bunnak 522 (BKF); Khao Soi Dao, 30 June 2001, Chamchumroon & Puff 1119 (BKF), 13 May 1974, Geesink, Hattink, Phengklai 6719 (BKF, K, L), 28April 2005, Kesonbua 170 (KKU); Khao Satap, 7 Jan. 1930, Kerr 17997 (BK,

BM, K, P)].

Distribution.— Laos, Vietnam.

Ecology.— Primary evergreen forest, sometimes along streams or in damp places; altitude 200–800 m. Flowering and fruiting periods: January to October.

Notes.— Tarenna membranacea is characterized by its white young branches, membranous ovate leaves, small inflorescences and broadly triangular or ovate calyx lobes. The species is similar to T. adangensis in leaf shape and size but not in texture. Calyx lobes and inflorescences are also different.

15. Tarenna pauciflora Craib, Bull. Misc. Inform., Kew 1915: 430. 1915 & Fl. Siam. 2: 93. 1932; Pit. in H.Lecomte, Fl. Indo-Chine 3(2): 215. 1923. Type: Thailand, Phrae, Me Kammi, near Rawng Kwang, 14 Feb. 1912, Kerr 2367 (holotype K!; isotypes BK!, BM!).

Thailand.— NORTHERN: Lampang [Mae Long, 10 March 1930,

init 1969 (K)];

Phrae [Mae Kammi, near Rong Kwang, 14 Feb. 1912, Kerr 2367 (BK, BM, K)].

Distribution.— Endemic to Thailand.

Ecology.— In primary evergreen forest; altitude 120–210 m. Flowering and fruiting periods: January to March.

Notes.— Tarenna pauciflora closely resembles T. adangensis in inflorescence and flower size but differs in having obovate or elliptic leaves, ovate calyx lobes with rounded apices and a shorter style-stigma complex.

16. Tarenna pilosa (Craib) Bremek., Feddes Repert. Spec. Nov. RegniVeg. 37: 202. 1934.— Pavetta pilosa Craib, Bull. Misc. Inform., Kew 1932: 433. 1932 & Fl. Siam. 2: 169. 1932. Type: Thailand, Trat, Khao Saming, 23 Jan. 1927, Put 534 (holotype K!; isotype BK!). Fig. 2.

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