Tree by the Mbam river, Centre Region, Cameroon, 1953-1968

"Mbam-elva". ("The Mbam river".) A tree by the river. Most of the root is above ground.姆巴姆-埃尔瓦（Mbam-elva），即姆巴姆河（Mbam river）。河畔生长有一棵树，其绝大多数根系裸露于地表。