Notes on the genus Syzygium (Myrtaceae) from Cambodia, Thailand, Vietnam, China and Taiwan Author Chantaranothai, Pranom 0000-0002-5065-6169 Applied Taxonomic Research Center (ATRC) and Centre of Excellence on Biodiversity (BDC), Department of Biology, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand & Royal Botanic Gardens, Kew, Richmond, Surrey TW 9 3 AE, UK text PhytoKeys 2024 2024-07-11 244 151 161 journal article 299706 10.3897/phytokeys.244.118657 0dde5265-4a83-4864-a6a9-471b7640af21 Syzygium prainianum (King) Chantar. & J. Parn. , Kew Bull. 48: 608. 1993 . Eugenia prainiana King , J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 70 (1): 116. 1901 . Type: Peninsular Malaysia , Perak , Blanta Mabok, Apr. 1890 , Wray 3990 ( lectotype , designated by Chantaranothai and Parnell 1994 , p. 97: K). Syzygium prainianum subsp. minor Chantar. & J. Parn. , Kew Bull. 48: 608. 1993 . Type: Thailand , Phangnga , Khao (Kao) Kata Kwam, 9 Mar. 1930 , Kerr 18481 ( holotype BM, isotypes BKF, K [K 001007999]), syn. nov. Type. Based on Eugenia prainiana King. Distribution. Thailand , Peninsular Malaysia , Borneo. Ecology. In evergreen forest, 900 m alt. Notes. Chantaranothai and Parnell (1993) proposed subsp. minor for Thai material with a slightly shorter hypanthial cup ( 3–4 mm long vs 5 mm long for the typical variety), stamens and style. After examination of Gardner & Chamchumroon ST 2467 K [001007729], a second new specimen collected from Trang , Thailand , I found that these characteristics are variable. Therefore, subsp. minor is here placed into synonymy of S. prainianum . This species is uncommon in Thailand but widespread in Peninsular Malaysia and Borneo. Specimens examined. Trang , Yanta Khao, Khao Banthat Wildlife Sanctuary, valley above Sai Rung Waterfall, Camp 2, 800 m alt., 14 Mar. 2006 , Gardner & Chamchumroon ST 2467 (K).