MAIN TYPES OF FOREST VEGETATION IN THAILAND Three new species of Piperaceae from Thailand Study on changes of land use and land cover based on RS and GIS technology NEW DATA FOR MAGNOLIACEAE PLANTS IN YUNNAN PROVINCE OF CHINA, THAILAND AND VIETNAM Contributions to the seed morphology and taxonomy of Justicia (Acanthaceae) from Thailand Genetic structure and diversity of Shorea obtusa (Dipterocarpaceae) in Thailand Piper protrusum (Piperaceae), a new species from southern Thailand based on morphological and molecular evidence Two new species of Curcuma (Zingiberaceae) used as cobra-bite antidotes Four Newly Recorded Species of Orchidaceae from Yunnan, China Taxonomic changes regarding three species of Zingiber (Zingiberaceae) from Thailand Further Notes on the Genus Lysimachia L. in Mainland S. E. Asia A taxonomic revision of the genus Lasianthus Jack. (Rubiaceae) from Thailand