BRIEF DESCRIPTION: All information is taken from Corner and Bas (1962). The cap of A. obsita is 20 - 45 mm wide, convex, becoming plane with a slightly depressed center or concave, pallid-whitish, sometimes pale fuscous in the center, with a sulcate-striate margin. The cap is sprinked with fine, grayish umber powder, dense over the disc, or the covering powdery layer breaks up into minute, dry warts.

The gills are free, subdistant, and white then pale cream.

The stem is 26 - 70 x 4 - 8 mm, cylindrical or attenuate upward, hollow, rather fragile, white, and exannulate.  A small bulb is present at the stipe base; some remnants of the universal veil are present as irregular rings on the upper half of the bulb.

The spores from dried material measure 5.8 - 6.7 x 5.2 - 6.1 µm (from fresh material, 6.5 - 7.5 (-8.0) x 6.0 - 7.0 (-7.5) µm) and are globose to subglobose to broadly ellipsoid and inamyloid. Clamps were not observed at the bases of basidia.

Amanita obsita was originally described from Singapore.

For a list of similar species, see the discussion of A. farinosa Schwein.  The present species (or something very similar) has recently been reported from Shorea forest in Thailand. -- R. E. Tulloss