BRIEF DESCRIPTION: The following is largely based on the original description (Wood 1997).

The cap of Amanita ananaecepitoides is up to 80 mm wide, convex at first, later plane or slightly depressed, smooth, dry, white to pale cream, finally pale cream-buff, with a nonstriate and appendiculate margin.  Volval remains are present as flat, membranous scales, fairly thick, white to concolorous with the cap.

The gills are free, thin, crowded, white to vaguely off-white, with a concolorous and finely serrate margin.  The short gills are present in at least two series.

The stem is 100 × 15 mm, pure white, and smooth.  The ring is white to pale cream, membranous, skirt-like, persistent, striate above.  The bulb can be narrowly spindle-shaped and radicating or merely very moderately swollen and radicating.  When there are volval remains on the bulb, they are present as a few white scales at the top of the bulb.

The spores measure 8.7 - 11.1 (-11.7) × 5.1 - 6.9 (-7.5) µm and are ellipsoid and strongly amyloid.  Clamps are distinct when found, but not common at bases of basidia.

Wood describes the mushroom as occurring in sclerophyll forests and "tall open forests" from the state of New South Wales, Australia.  A sclerophyll forest in the Australian bush is a forest of hard-leaved plants including Eucalyptus in the overstory (wikipedia).