A new tree species (Sapotaceae) and a new species record for Thailand (Flacourtiaceae) from Khao Yai National Park

A new species of tree, Pouteria stellibacca Maxw. (Sapotaceae), and a new species record for Thailand, Homalium cochinchinense (Lour.) Druce (Flacourtiaceae), have been discovered in the Mo Singto area of Khao Yai National Park, Central Thailand, at about 14̊  N latitude.  The Pouteria trees, reaching 35 m in height, are deciduous, buttressed, and have (among other distinct characters) 5-lobed fruit.  Their vegetative and reproductive characters are described herein.  Both species were found in primary, seasonal evergreen forest, the Pouteria at 775-780 m and the Homalium at about 800-1175 m elevation.