BRIEF DESCRIPTION: The cap of Amanita illudens is 25^± mm or more wide, ochraceous yellow, nonappendiculate (Cooke, 1892), with a striate margin in the dry specimen. The flesh is white and about 6% of the stem length, thinning evenly to margin. The volva is present as broad, unequal warts or patches (up to 6^± mm wide), scattered, detersile, and somewhat browner than the cap.

The gills are free and attenuated behind, with decurrent lines on the stem apex, close to crowded, with a serrulate edge, and white.

The stem is 50^± x 4 - 6 mm or larger, slender, cylindric, ochraceous yellow, and exannulate. The flesh is hollow and white, with the width of the central cylinder about 15% of the stem length. The sheathing volva is membranous, externally concolorous with the stem in Cooke's plate, and grayish buff compared to the white of the stem flesh in Cooke's cross-sectional illustration (Cooke, 1892).

The spores measure (7.2-) 8.0 - 9.4 (-11.3) x (6.6-) 6.7 - 7.8 (-8.4) µm and are subglobose to broadly ellipsoid to ellipsoid and inamyloid. Clamps were not observed at bases of basidia despite an extended effort because of the present condition of the type. If this species is indeed a member of the Caesareae, then clamps should be found in material that is collected and preserved with care.