Amanita pantherina

Common Name: None
Description: cap 7-18 cm across, convex becoming flatter with a lined margin; creamy to whitish yellowish, darker in the center; smooth, sticky when moist, with virtually concentric rings of thin, flattened, cottony warts of whitish volval material. Stem 80-200 by 8-20 mm high and wide.
Habitat: singly or in small groups on the ground in mixed coniferous and deciduous woods. Frequent. Found in eastern North America.
Edible: Poisonous.

Source: Mushrooms of North America by Roger Phillips.