"B. rupestris" is deciduous. Trees in their native habitat are typically leafless between September and December; the timing, duration and extent of leaf drop may be affected by extremes of rainfall or drought. Sometimes trees shed leaves from only some branches. On every tree, the leaves vary in shape, ranging from narrow and elliptic to deeply divided. The upper surface is glossy, contrasting with a pale undersurface. The adult leaf blades are long and wide with pointed ( or ) tips. They have a raised on the upper and lower surface, with 12–25 pairs of lateral veins that are more prominent on the upper surface, arising at 50–60 degrees from the midrib. The compound juvenile leaves have 3–9 spear-shaped (lanceolate) or linear lobes. These each measure long and wide.