Amanita fulva, also known as Tawny grisette, is a medium-sized agaric with distinctive tawny cap and white gills, no ring and usually without cap patches but with volval bag. It grows solitary or scattered on soil in mixed woodlands, favouring birch.

Cap oval to ovoid, becoming broadly convex or nearly flat. It is initially sticky, particularly when wet, and may be tawny brown to brown in colour. The cap may have a few scattered white to tawny patches, but it is otherwise bald. The margin of the cap is prominently lined or grooved. As the mushroom matures, the cap becomes orange-brown, paler towards the margin, and darker, even very dark brown, in the centre. The cap develops an umbo when expanded, and the margin becomes strongly striated. The flesh is white and brittle. Gills free from the stem or slightly attached to it. They are whitish in colour, and are either close or nearly crowded. Short-gills are infrequent. Stem whitish or pallid cap colour, narrower towards the apex and arising from a white volval bag that fits loosely around the stem. Hollow in mature specimens. The stem has no ring. Spore print white.

Microscopic Features: The spores are approximately spherical, smooth, and measure 9.5-12.5 µm in length and 9.7-12.5 µm in width. They are nonamyloid.

Amanita fulva on the First Nature Web site.
Amanita fulva on the MushroomExpert.Com Web site.