Genea harknessii

Genea harknessii, commonly known as the dark geode truffle, is a species of fungus in the genus Genea. The species was described by Helen Gilkey in 1916.

The mature fruit is up to 2.5 centimetres (1 in) across. It has a convoluted, coral-like appearance. The exterior is dark brown (to nearly black) with a hollow interior, the surfaced of which is dark brownish. The sterile flesh between the dark interior and exterior 'skin' is white to grayish.