BRIEF DESCRIPTION: Fruiting bodies of Amanita kotohiraensis are small to medium-sized, often with an unpleasant smell.  The cap is (30-) 50 - 80 mm wide, convex, white, sometimes cream in the center; and it is covered with white, felty to patchy volval remnants; the margin is appendiculate; and the context is white.

The gills are free and yellowish; the short gills are attenuate.

The stipe is 60 - 130 x 5 - 15 mm, subcylindric or attenuate upwards, with a surface and context that are white.  The stipe's basal bulb is 15 - 40 mm wide and subglobose, with its upper part covered with white, verrucose, granular to subconic volval remnants.  The annulus is white and fugacious.

Spores measure (7.0-) 7.5 - 9.5 (-11.0) x 5.0 - 6.5 (-7.0) µm and are broadly ellipsoid to ellipsoid and amyloid.  Clamps are common at the bases of basidia.

Amanita kotohiraensis was originally described from Japan.  It is not uncommon in China. -- Zhu L. Yang<