สำนักราชบัณฑิตยสภา

วารสารราชบัณฑิตยสถาน ปีที่ ๓๗ ฉบับที่ ๑ ม.ค.-มี.ค. ๒๕๕๕ Abstract The genus Hedychium J. König (Zingiberaceae) in Thailand is taxonomically revised, result of which 21 species and 6 varieties are enumerated. In Part 1, description of the genus with key to species were given, and 10 species and 4 varieties were listed. H. forestii Diels were recognized as one of the 4 varieties of H. coronarium J. König in this first part. In continuation of the first part, 11 species and 2 varieties are listed, of which descriptions, ecological data, geographical distributions and some illustrations are provided. Diagnostic characters of each taxon are also discussed. Two new synonyms, H. samuiense Sirirugsa (synomymous to H. roxburghii Blume) and H. thaianum Mokkamul & Picheans. (synonymous to H. pauciflorum S.Q. Tong), are proposed. Key words: taxonomic revision, Zingiberaceae, Hedychium J. König, Thailand 11. Hedychium muanwongyathiae Picheans. & Wongsuwan, J. Jpn. Bot. 84: 330-337. 2009 [Type: Thailand: Northtern, Chaing Mai, Doi Angkhang, N 19º 50' 48", E 99º 03' 004", alt. 1,044 m, 10 August 2008; Picheansoonthon & Wongsuwan 064 (holotype BKF, paratypes BK, SING)]. Figures 6A, 6B and 6C. Terrestrial, perennial herb. Pseudostems 0.7-1.3 m high, bladeless sheaths 2-4. Ligule oblong,2.4-3.1 by 3.3-4.6 cm, apex round, membranous, pubescent, reddish. Leaves sessile; lanceolate-oblong, 38.3-48.5 by 17.8-19.4 cm, base cuneate, apex acuminate-caudate, margin entire, upper surface glabrous, lower surface pubescent. Inflorescence a terminal spike, erect, 21.6-28.2 cm long; peduncle 5.5-7.6 cm long, glabrous; bracts lax, folded, oblong, 4.3-4.5 by 1.4-1.8 cm, apex acute, glabrous, greenish, each subtending a cincinnus of 2-4 flowers; primary bracteole tubular, 2.4-2.9 by 1.3-1.9 cm, apex acute, membranous, glabrous except apex hairy; second bracteole tubular, ca. 2.2 by 0.1-1.1 cm, apex acute, glabrous except apex hairy; third brac- Taxonomic Revision of the Genus Hedychium J. Konig (Zingiberaceae) in Thailand (Part 2) Pornpimon Wongsuwan 1 and Chayan Picheansoonthon 1,2 1 Pharmaceutical Botany and Pharmacognosy Research Unit, Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen 40002, Thailand 2 The Academy of Science, The Royal Institute of Thailand Sanam Suea Pa, Sri-ayudhaya Road, Khet Dusit, Bangkok 10300, Thailand E-mail: chayan@kku.ac.th