Included here is much of Thailand together with the western parts of Laos and Tenasserim (Burma).
Of the endemic and near endemic vascular plants so far recorded there are about 1984 species in 771 genera and 145 families. There are 14 endemic genera (marked red) but no endemic families.
Campbell, D. G. & Hammond, H. D. 1989. Floristic Inventory of Tropical Countries. The New York Botanical Garden.
Seidenfaden, G. & Smitinand, T. 1959. The orchids of Thailand. A preliminary list. The Siam Society, Bangkok.