Size of the disk: around 15 cm.It was found in what was originaly Araucaria moist forest. This area was heavily damaged for exploration of wood, but is now in process of recovery. Calcareous soil. A friend told me that it was a wine cap mushroom (Stropharia rugosoannulata), but literature I found says that that species occurs in Europe and North America only. Although wine cap is an edible (and very appreciated) mushroom, I haven’t notice of its introduction in Brazil.

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Introduced in Brazil …
By: Susanne Sourell (suse)
2014-07-24 09:02:20 CDT (-0400)

Cortez, V.G. and Silveira, R.M.B. (2008). The agaric genus Stropharia (Strophariaceae, Agaricales) in Rio Grande do
Sul State, Brazil. Fungal Diversity 32: 31-57.

Common species
By: walt sturgeon (Mycowalt)
2014-04-23 11:15:45 CDT (-0400)

that has expanded its range probably partially due to transport of wood mulch. As far as I know it is was not in any North American Field guide prior to 1970.

Glad you posted this on here…
By: Randy Longnecker (Randy L.)
2014-04-23 10:52:48 CDT (-0400)

Hopefully someone else will chime in soon with an opinion.