The shiny, ellipsoid Ochna serrulata buds display the outer surfaces of their five greenish yellow sepals. In the open flowers the larger, softer and brighter yellow petals curve forward, the sepals recurved further back but follow the same curvature. The only parts in picture that may be hairy are the pedicels, but the hairs are very short.
Whitish lenticels are densely scattered on some of the younger stems. Lenticels allow the uncontrolled interchange of gases between the plant and the environment. The leaves in the background have gloss like the sepals (Venter, 2012; Coates Palgrave, 2002; Pooley, 1993; iNaturalist; https://treesa.org).