BRIEF DESCRIPTION: The cap of A. pakistanica is up to 80 mm wide, campanulate to convex when young, plane then convex at maturity, umbonate, nonappendiculate, with a striate margin (15 - 20% of the radius).  The cap is white to cream colored to pale tan away from the center and orange-tan to light brown to brown in the center.  The flesh is white.  The volva is absent or present as patches or small flakes; it is membranous to submembranous and detersile.

The gills are free, crowded, and white to pale pinkish.  The short gills are truncate, of diverse lengths, plentiful, and unevenly distributed.

The stem is up to 150 x 10 mm, white, narrowing upward, with pallid ridges encircling or partially encircling the stem.  The flesh is white.  The saccate volva is up to 32 x 30 µm, subovoid, membranous to submembranous, white to off-white, sheathing, and attached in part to sides of stem base.

The spores measure (10.0-) 10.1 - 12.2 (-12.8) x (6.5-) 7.0 - 8.8 (-9.2) µm and are broadly ellipsoid to ellipsoid (infrequently elongate) and inamyloid.  Clamps are common at bases of basidia.

The species is associated with Fir.  This species is known from the Northwest Frontier Province of Pakistan.

The weakly structured volva is unusual among the Slender Caesars.  For comparisons to other Slender Caesars, see A. jacksonii Pomerleau. -- R. E. Tulloss