5 O-03       !"# $# #%"# Diversity of vascular plants in the floodplain vegetation of Trang River Basin

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ABSTRACT The study on diversity of the vascular plants in the Trang River Basin, peninsular Thailand was carried out from November 2008 to February 2010. One hundred and sixty three species were recorded. These species belong to 8 species (4.9%) of Ferns, 95 species (58.3%) of Eudicots, 2 species (1.2%) of Magnoliids and 58 species (35.6%) of Monocots. They are composed of 55 species of aquatic plants and 108 species of terrestrial plants. The aquatic plants could be divided into 38 species of annual plants and 17 species of perennial plants. The terrestrial plants could be divided into 25 species of annual plants and 83 species of terrestrial plants. Keywords: floodplain, Trang River Basin, vascular plants, biodiversity

*Corresponding author: [email protected] 1 ?>8k 3 "1"6 6 (PSU) >   8  .1"6 6 2.$5m ;.1" 90112 1Prince of Songkla University Herbarium (PSU), Department of Biology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112 1
 

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Table 1. List of plant species found in Trang River basin floodplain vegetation. Fami ly Scientific name Life form 1 Voucher Ferns Lygodiaceae Lygodium microphyllum (Cav.) R. Br. Ptv Patt. 220 Ophioglossaceae Helminthostachys zeylanica (L.) Hook. Pth Patt. 471 Polypodiaceae Drymoglossum piloselloides C. Presl Pte Patt. 219 Dryna ria quercifolia (L.) J. Sm. Pte Patt. 283 Unknown 1 Pte Pteridaceae Acrostichum aureum L. Pae Adiantum sp. Pth Ceratopteris thalictroides (L.) Brongn. Aae Eudicots Acanthaceae Unknown 2 Ath Patt. 562 Amaranthaceae Alternanthera ses silis (L.) R. Br. ex DC. Aae Patt. 408 Apocynaceae Aganosma marginata (Roxb.) G. Don Ptc Patt. 240 Atherandra acutifolia Decne. Ptv Patt. 565 Hoya parasitica Wall. ex Wight Ptv Patt. 217 Ichnocarpus frutescens R. Br. Ptv Taxocarpus sp. Ptv Patt. 458 Tylophora indica Merr Ptv Patt. 224 Tylophora tenuis Blume Ptv Patt. 234 Wrightia religiosa Benth. & Hook. f. Pts Patt. 181 3
 

  5 Table 1 . (Continue) Family Scientific name Life form 1 Voucher Asteraceae Eclipta prostrata L. Pth Patt. 350 Balsaminaceae Hydrocera angustifolia Blume Aae Patt. 342 Bignoniaceae Dolichandrone columnaris Santisuk Ptt Patt. 268 Boraginaceae Heliotropium indicum L. Ath Patt. 235 Campanulaceae Lobelia alsinoides Lam. Aae Patt. 453 Cleomaceae Cleome rutidosper ma DC. Ath Patt. 284 Combretaceae Combretum trifoliatum Vent. Ptc Patt. 178 Terminalia calamansanay Rolfe Ptt Patt. 557 Convolvulaceae Aniseia martinicensis Choisy Atv Patt. 236 Merremia hirta Merr. Atv Patt. 244 Dilleniaceae Dillenia hookeri Pier re Ptu Patt. 401 Tetracera loureiri (Finet & Gagnep.) Pierre ex Craib Ptw Patt. 337 Drosearaceae Drosera indica L. Aae Patt. 374 Euphorbiaceae Croton caudatus Geiseler Pts Patt. 215 Shirakiopsis indica (Willd.) Esser Pa/tt Patt. 358 Fabaceae Acac ia pennata Willd. Pts Patt. 567 Aeschynomene indica L. Pas Adenanthera pavonina L. Pts Patt. 456 Derris elliptica (Roxb.) Benth. Ptw Derris scandens (Roxb.) Benth. Pa/tw Derris sp. Pa/tw Flemingia macrophylla (Willd.) Prain Ptu Patt. 566 Flemingia strobilifera (L.) W. T. Aiton Ptu Patt. 197 Sesbania javanica Miq. Pas Patt. 381 Hydrophyllaceae Hydrolea zeylanica (L.) Vahl Aae Patt. 176 Lamiaceae Clerodendrum paniculatum L. Pts Glossocarya linnaei Benth. & Hook. f. Pts Patt. 34 8 Premna annulata Fletcher Ptw Patt. 244 -1 Vitex glabrata R. Br. Ptt Patt. 260 Lecythidaceae Barringtonia acutangula (L.) Gaertn. Ptt Patt. 196 Lentibulariaceae Utricularia auria Lour. Aa f Utricularia bifida L. Aae Patt. 288 Utricularia caeru lea L. Aae Patt. 373 Loranthaceae Macrosolen cochinchinensis (Lour.) Tiegh. Pte Patt. 194 Lythraceae Amma nnia sp. Aae Patt. 177 Lagerstroemia floribunda Wall. Ptt Patt. 362 Lagerstroemia speciosa (L.) Pers. Ptt Patt. 246 Melastomataceae Melastoma malabathricum L. Pts Patt. 189 Menisperma ceae Unknown 3 Ptw Patt. 242 Malvaceae Melochia corchorifolia L. Ath Patt. 275 Microcos tomentosa Sm. Pts Patt. 344 Pantapetes phoenicea L. Aae Sida rhombifolia L. Ptu Patt. 462 Urena lobata L. Ptu Pat t. 239 Moraceae Ficus hispida L. f. Pts Maclura cochinchinensis (Lour.) Corner Ptc Patt. 261 Streblus asper Lour. Pts Patt. 227 Streblus perakensis Corner Pts Patt. 223 Myrtaceae Syzygium sp. Ptt Patt. 355 Olacaceae Olax scandens Roxb. Ptw Pat t. 241 Onagraceae Ludwigia hyssopifolia (G. Don) Exell Aae Ludwigia octovalvis (Jacq.) P. H. Raven Aae Phyllanthaceae Antidesma ghaesembilla Gaertn. Pts Patt. 193 Breynia vitis -idaea (Burm. f.) C. E. C. Fisch. Pts Patt. 195 Bridelia sp. Pts Patt. 272 Flueggea virosa (Willd.) Voigt Pts Patt. 437 Glochidion rubrum Blume Pts Patt. 183 Hymenocardia punctata Wall. Pa/ts Patt. 218 Sauropus cf . rostatus Ptu Patt. 273 Phyllanthus reticulatus Poir. Pts Patt. 438 Phyllanthus urinaria L. Ath Patt. 424 4
 

  5 Table 1 . (Continue) Family Scientific name Life form 1 Voucher Polygalaceae Salomonia longiciliata Kurz Aae Patt. 375 Xanthophyllum eurhynchum Miq. Pts Patt. 221 Polygonaceae Persicaria attenuata (R. Br.) Soják Aae Patt. 174 Ra nuncu laceae Naravelia dasyoneura Korth. Ptv Patt. 225 Rhamnaceae Ziziphus oenopolia (L.) Mill. Pts Patt. 180 Rubiaceae Borreria alata (Aubl.) DC. Ath Canthium horridum Blume Pts Patt. 182 Hedyotis herbacea L. Ath Patt. 409 Kailarsenia campanula (Rid l.) Tirveng. Ptc Patt. 214 Meyna sp. Pts Patt. 269 Mitragyna diversifolia Havil. Ptt Patt. 231 Morinda elliptica Ridl. Ptt Patt. 228 Nauclea orientalis L. Ptt Patt. 441 Paederia foetida L. Atv Patt. 472 Tamilnadia uliginosa (Retz.) Tirveng . & Sastre Ptt Patt. 245 Sapindaceae Allophylus cobbe (L.) Raeusch. Pts Patt. 285 Lepisanthes rubiginosa (Roxb.) Leenh. Ptt Patt. 190 Scrophulariaceae Limnophila erecta Benth. Aae Limnophila laxa Benth. Ath Patt. 507 Lindernia ciliata (Colsm.) Pennell Aae Patt. 372 Lindernia crustacea (L.) F. Muell. Aae Patt. 433 Stylidiaceae Stylidium tenellum Sw. ex Willd. Aae Patt. 508 Urticaceae Pouzolzia zeylanica (L.) Benn. Ath Patt. 563 Vitaceae Leea rubra Blume Pts Patt. 264 Magno liids Annona ceae Uvaria rufa Blume Ptw Patt. 262 Lauraceae Litsea sp . Ptt Patt. 343 Monocots Alismataceae Limnocharis flava Buchenau Aae Patt. 173 Araceae Lasia spinosa (L.) Thwaites Pag Typhonium flagelliforme (Loddiges) Blume Aae Patt. 204 Amaryllida ceae Crinum sp. Pag Patt. 184 Commelinaceae Commelina diffusa Burm. f. Pth Patt. 387 Cyanotis axillaris (L.) D. Don ex Sweet Pth Patt. 232 Murdannia nudiflora (L.) Brenan Pth Patt. 388 Cyperaceae Actinoscirpus grossus (L. f.) Goetgh. & D.A. Simp son Pae Patt. 401 Cyperus babakan Steud. Pae Patt. 405 Cyperus compactus Lam. Pae Patt. 186 Cyperus digitatus Roxb. Pae Patt. 403 Cyperus elatus L. Pae Patt. 449 -1 Cyperus haspan L. Aae Patt. 175 Cyperus imbricatus Retz. Pae Patt. 449 -2 Cyperus pilosus Vahl Aae Patt. 429 Cyperus pulcherrimus Willd. ex Kunth Aae Patt. 419 Eleocharis acutangula (Roxb.) Schult. Pae Patt. 428 Fimbristylis acuminata Vahl Ath Patt. 485 Fimbristylis miliacea (L.) Vahl Aae Patt. 406 Fimbristylis sch oenoides Vahl Aae Patt. 436 -2 Fimbristylis tetragona R. Br. Pae Patt. 475 Fimbristylis umbellaris (Lam.) Vahl Pae Patt. 422 Kyllinga brevifolia Rottb. Ath Patt. 446 Lipocarpha microcephala (R. Br.) Kunth Ath Patt. 480 Pycreus flavidus (Retz.) T . Koyama Aae Patt. 483 Pycreus polystachyos (Rottb.) P. Beauv. Aae Patt. 492 Rhynchospora corymbosa (L.) Britton Pae Patt. 402 Rhynchospora rubra (Lour.) Makino Ath Patt. 454 Scleria poiformis Retz. Pae Patt. 423 Dioscoreaceae Dioscorea sp. Ptv Patt. 568 Eriocaulaceae Eriocaulon truncatum Buch. -Ham. ex Mart. Aae Patt. 481 Eriocaulon xeranthemum Mart. Aae Patt. 499 Flagellariaceae Flagellaria indica L. Ptv Patt. 226 5
 

  5 Table 1 . (Continue) Family Scientific name Life form 1 Voucher Hydrocha ritaceae Ottelia alismoides (L.) Pers. Aab Patt. 504 Liliaceae Gloriosa superba L. Ptv Marantaceae Schumannianthus dichotomus Gagnep. Pae Orchidaceae Aerides sp. Pte Dendrobium crumenatum Sw. Pte Micropera pallida Lindl. Pte Patt. 385 Thrixspermum leucarachne Rild. Pte Patt. 346 Poaceae Cynodon dactylon (L.) Pers. Ath Patt. 489 Echinochloa colona (L.) Link Ath Patt. 450 Eragrostis sp. Ath Patt. 506 Hymenachne acutigluma (Steud.) Gilliland Aae Patt. 447 Isachne globosa Kuntze Ath Patt. 505 Ischaemum rugosum Salisb. Aae Patt. 426 Oryza rufipogon Griff. Aae Panicum sp. Ath Patt. 280 Paspalum conjugatum P. J. Bergius Ath Patt. 445 Paspalum longifolium Roxb . Ath Patt. 233 Paspalum scrobiculatum L. Ath Patt . 391 Sacciolepis indica (L.) Chase Ath Patt. 469 Pontederiaceae Monochoria hastata Solms Aae Monochoria vaginalis (Burm. f.) C. Presl ex Kunth Aae Patt. 407 Smilacaceae Smilax sp. Ptv Stemonaceae Stemo na sp. Ptv Patt. 354 Xyri daceae Xyris i ndica L. Aae Patt. 188 Xyris pauciflora Willd. Aae Patt. 187 1Aab=Annual aquatic submerged, Aaf=Annual aquatic free floating, Aae=Annual aquatic emergent, Ath= Annual terrestrial herbs, Atv= Annual terrestrial vines, Pa/tw=Perennial aquatic/terrestrial woody climbers, Pae=Perennial aquatic emergent, Pag=Perennial aquatic geophytes, Pas=Perennial aquatic shrubs, Pa/ts=Perennial aquatic/terrestrial shrubs, Pa/tt=Perennial aquatic/terrestrial trees, Ptc=Perennial terrestrial scandent, Pte=Perennial terrestrial epiphytes, Pth=Perennial terrestrial herbs, Pts=Perennial terrestrial shrubs, Ptt=Perennial terrestrial trees, Ptu=Perennial terrestrial undershrubs, Ptv=Perennial terrestrial vines, Ptw=Perennial terrestrial woody climbers

Figure 1. Predominant families of vascular plants in Trang River floodplain vegetation.

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