การศึกษาอนุกรมวิธานของไม้พุ่ม ไม้ล้มลุก และไม้เลื้อยในอุทยานแห่งชาติปางสีดา จังหวัดสระแก้ว / ปวีณา ใจกระเสน = Taxonomic study of shrubs herbs and climbers at Pang Sida National Park, Srakaew Province / Paweena Jaikrasane
Pang Sida National Park, Sra Kaew Province, is the 41st National park of Thailand. There is little information on plant diversity compared to adjacent area. The present study, thus, has an objective to investigate some flora in this area. Expedition and collection of shrub, herb and climber specimens were carried out during May 2002 to April 2003 in 3 routes. The first route started at the park head quarter to the view point, ca. 25 km. apart. The second is Bu Ta Pod glassland route and the third is Pang Sida - Pha Ta Kien waterfall route. Specimens were gathered in total of 250 numbers, and identified to 110 species, 1 subspecies and 7 varieties in 86 genera and 30 families. Of these, 25 species were monocotyledonous plants and 85 species, 1 subspecies and 7 varieties were Dicotyledonous plants. Among monocotyledonous families, Orchidaceae and Zingiberaceae were the first and second highest in number of species found, 17 and 6, respectively. Furthermore, of dicotyledonous families, Rubiaceae was the richest, 10 species and 1 variety found, while Fabaceae and Convolvulaceae were the second richest with 9 species each. In this research we found the new record to Thailand, Merremia cissoides (Lam.) Hallier that might be an exotic species, 6 endemic species of Thailand, and 2 rare species. The comparison between Pang Sida National Park and the nearest area found 50 species in common. The rest are different which may be due, in part, to vegatation, climatic and edaphic factors. Voucher specimens are deposited at the Professor Kasin Suvatabhandhu Herbarium, Department of Botany, Faculty of Science, Chulalongkorn University