"Tree Seeds and Seedlings for Restoring Forests in Northern Thailand" - this publication is out of print, but you can still access it in English and Thai through the Resources > Library tab ((PDF format). It includes written descriptions and line drawings of 45 species that have successfully been used for forest-ecosystem restoration projects.
This database was compiled by Dr. Greuk Pakkad (sponsored by Thailand's National Science and Technology Development Agency). It enables users to search for seedling/sapling species by name (to check species labels in nurseries) and to identify species from leaf characteristics and germination type. There are 308 species in the database. Summary information is in English. Full descriptions are in Thai. All species are illustrated at several stages of development. Scroll down for an explanation of the terminology used to search the database. 
TERMINOLOGY EXPLAINED:
Germination type
- epigeal
- hypogeal
Leaf blade form
Leaf blade apex
Leaf blade base
