Dark Vegetable Caterpillar (Cordyceps gunnii)

These look like earth tongues but are fairly large compared to most geoglossum. Above ground they are up to 89mm tall, usually a single tapering spike but sometimes different shapes and double headed. They form from the parasitised larvae of Abantiades or Oxycanus moths and therefore found under endemic acacia species. Overall they can be up to 200mm long white underground, yellow near the surface. (left)
The fine white 'fur' is spore.