Amanita flavoconia

This is a key to gilled mushrooms, that is, mushrooms having a definite cap with a fertile surface consisting of gills. The fruiting body usually also has a stem, although that may be lateral or absent (usually, then, the mushroom is growing from wood). You can use this key to identify mushrooms that you find.

Fruiting body containing fibers (usually in the stalk)

Fruiting body having a combination of some of the following characteristics:
Stalk growing out of a cup of cottony tissue called a volva (all white-spored mushrooms with a volva go here)
Cap with scattered patches or flakes of the same sort of tissue as the volva (see second picture), easily peeled off
Annulus (skirt-like ring on stalk)

Validae     Section Annulus present Volva absent Usually, the base of the stem has a little knob, but is smooth and otherwise unremarkable Entire cap (not just the margin) often becoming wavy in age

Links from Look-alikes Small Yellow Smooth Bulb Amanitae     SubSection Base of stalk slightly and smoothly bulbous Cap some shade of yellow; less than 5" across, and usually less than 3 Annulus usually present, but it may be fragile and easily lost, or plastered to the stem and overlooked

Amanita flavoconia     G. F. Atkinson