Amanita imazekii - a new species in Amanita section Caesareae

A new species, Amanita imazekii, from the central and eastern parts of the Japanese archipelago, is described. This fungus is a large mushroom with sh ort striate and brown to grayish-brown pileus, saccate vulva, annulus and n on-amyloid globose to subglobose basidiospores. It is considered to be a ne w member of Amanita section Caesareae. The species may have an ectomycorrhi zal relationship with trees of Pinaceae and/or Quercus.