An annotated checklist of the genus Pseuderanthemum Radlk. (Acanthaceae) in Thailand
A checklist of the genus Pseuderanthemum in Thailand is presented, including ecological data, distributional information and specimen citations. Sixteen taxa are recognized, of which 11 taxa are native and five are introduced, including two new species; Pseuderanthemum thailandicum T.Choopan & P.J.Grote and P. lanceophyllum T.Choopan. A key to the species is also given. Lectotypes for 5 names are also designated.