Synedrella nodiflora (L.) Gaertn is a widely distributed tropical plant species. Nevertheless, it has taxonomically been the only member of genus Synedrella. Hence, it is interesting to study the morphological and physiological adaptation in different altitudes. Three altitudes were selected in this study, i.e. 0, 130, and 820 m above sea level. The parameters examined included number of stomata and trichomes per leaf area unit, size of glandular and non-glandular trichomes, size of peripheral and central flowers, number of peripheral and central cypsellas, seed germination. It seems likely that number of trichomes and seed formation tend to show differences among altitudes.

Synedrella nodiflora; adaptation; altitude