Twenty-three species of Strobilanthes Blume with capitate inflorescences are enumerated in Thailand.Strobilanthes phengklaii Kladwong & Chantar., a new species from North-eastern Thailand, is described and illustrated.Strobilanthes paniculiformis J.R.
I.Wood, S.phyllostachya Kurz and S.squalens S.Moore hus726040als214 are new records in Thailand.
Strobilanthes kerrii Craib is reinstated, and S.evrardii var.parviflora J.B.Imlay, S.
bombycina J.B.Imlay, Hemigraphis hispidula Craib and Sericocalyx thailandicus Bremek.are treated as new synonyms.19 taxa are lectotypified.
A key to species, taxonomic notes and photographs michael harris ii headband are provided as well as a preliminary conservation assessment and distribution maps.