The fructification of Fomes semitostus does not usually make its appearance until long after the death of the tree. Where rubber trees have died however it is frequently to be found on a neighbouring jungle stump. The fructification or sporophore grows out in the form of a flat semi-circular bracket from the decaying log or stump. It is distinguishable from innumerable other "bracket fungi" by its characteristic colours. When fresh, the upper surface is coloured a rich brown with a narrow rim of yellow, whilst the under surface is bright orange. The consistency of the fructification is woody and brittle, and the lower surface is covered replanting with Hevea in less than twelve months from the date of destroying the diseased trees. This method of isolating an infected area by trenching was first proposed by Hartig for use in forestry work. It was recommended by Massee for dealing with Rosellinia in tea.