A while back we found hundreds of these interesting Agaricus species growing in cattle pasture around Narre Warren. Some were quite large and gold to grey capped with dark brown gills, a potent smell of almonds or aniseed and slow gold staining on the stipe.

We assumed these were actually a local variant of arvensis but recent DNA results demonstrate this is a newly described Agaricus species (Agaricus burneocanus) – that only occurs in Australia as part of section Arvensis with its closest phylogenetic relatives being the prized edibles Agaricus macrosporus and Agaricus arvensis.