Amanita constricta

Appearance

Pileus
Cap 6.0-12.0 cm broad, convex, expanding to nearly plane at maturity, sometimes with a low umbo; margin incurved, then decurved to straight, conspicuously striate; surface moist, viscid in wet weather, glabrous, grey to brownish-grey, often with patches of whitish to pale-grey universal veil tissue, the latter bruising reddish-brown when fresh; context whitish to pale-grey, soft, up to l.5 cm thick at the disc, elsewhere thin, unchanging when injured; odor mild, of fish in age; taste mild.

Lamellae
Gills free, close to crowded, up to 1.0 cm broad, whitish to pale-grey, the edges usually darker and appearing fringed when viewed with a hand lens; lamellulae up to four-seried.

Stipe
Stipe 9.0-17.0 cm long, 1.0-2.0 cm thick, more or less equal, or narrowed toward the cap, stuffed at maturity; surface of apex whitish, pruinose, the ornamentation striate; lower stipe covered with fine grey-brown scales, becoming more coarse toward the base; volva membranous, saccate, bruising reddish-brown where handled, fused to the stipe except for a flaring margin; partial veil absent.

Spores
Spores 9.5 x 11.5 x 8.5-10 µm, subglobose, smooth, thin-walled, inamyloid; spore print white.

Habitat

Solitary to scattered under hardwoods such as oaks (Quercus spp.) or with Tanbark oak (Lithocarpus densiflora); fruiting from after the fall rains to mid-winter.