These are the acorns of a Lithocarpus sp. MacRitchie, 11 Mar 2005. “That Oak-trees (Quercus, Lithocarpus) occur in Malaya often comes as a surprise because our ideas on the nature and distribution of plants are sadly distorted through ignorance of tropical botany”, Corner (1998) in Wayside trees of Malaya.
Corner, E.J.H. (1988). Wayside Trees of Malaya.Vol 1. The Malayan Nature Society, KL, Malaysia