A new species of Amanita growing under Eucalyptus is discovered in South Brazil

Amanita aliena is described as new species from a Eucalyptus plantation in South Brazil. It belongs to subgenus Amanita where it has an isolate phenetic position, due to distinct morphology: yellowish brown pileus, universal veil as wart forming broken collars on the top of bulb from the junction to stipe base to near base, large basidiospores (7.5-) 8.5-14.5 (-16) x (5.7-) 6-9.5 (-11) mu m, subhymenium with non-inflated cells and scarcity of clamp connection at base of basidia.