Within the Sapotaceae, the tribe of the Madhuceae presents a very homogeneous group. One point of view is to consider it a single polymorphous genus. The opposite opinion was expressed by Pierre, who distinguished a number of small genera, many on futile characters. Amongst those which stood later criticism is the genus Ganua which was, however, not published by Pierre but by Dubard (1907, 1908a, 201 and 1908b, 407), who adopted Pierre’s Ms names and made use of his extensive annotations. The name Ganua is derived from the word ganu, the native name for latex produced by a tree, “used for falsifying the valuable products of ‘gutta terbu’” (f. Errington de la Croix in schedula; cf p. 389).