This compilation, the first of a series, presents additions, corrections, and amendments to the Convolvulaceae account for the Flora of Thailand that was published 10 years ago. Methods used include the traditional study of dried voucher specimens housed in herbarium collections, field research and collecting, and monitoring photographs of Thai Convolvulaceae shared on selected natural history applications. This initial compilation results in 13 species new to the flora, updates names for eight species, amends taxonomic concepts (and names) for four species, and augments the distribution for 16 species. One orthographic change is made to bring a binomial into conformity with the International Code of Nomenclature. We highlight significant discoveries for two rare and little-known Thai Convolvulaceae species. References are cited to document descriptions, ecology, distributions beyond Thailand, and several new taxonomic works published since 2010.

Four species of Tetrastigma are newly recorded for Thailand, including T. assimile (Kurz) C.L.Li ex P.Kochaiphat & Trias-Blasi, T. macrocorymbum Gagnep. ex J.Wen, Boggan & Turland, T. pyriforme Gagnep., and T. triphyllum (Gagnep.) W.T. Wang var. triphyllum. A new combination, T. assimile (Kurz) C.L.Li ex P. Kochaiphat & Trias-Blasi is provided.

Abstract. Two new species of Tetrastigma from Thailand,

As part of a comprehensive review of the genus Erycibe (Convolvulaceae) in South-East Asia, three new species are described and illustrated: E. sangiheensis Kochaiph. & Utteridge sp. nov. from Sangihe Island, North Sulawesi Province in Indonesia and two from Borneo (E. trichocarpa Kochaiph. & Utteridge sp. nov. and E. brunneopilosa Kochaiph. & Utteridge sp. nov.). A distribution map, line drawings and preliminary IUCN conservation assessments are provided for all three species.

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