Amanita citrina

Common Name: None.
Description: Cap 5-12 cm across, convex than flat; pale lemon yellow to greenish yellow, usually covered with many patches of felty whitish veil; smooth, dry or viscid when wet. Stem is 60-120 by 10-15 mm high and wide.
Habitat: in oak and pine woods. Occasional. Found in eastern North America.
Edible: Not edible.

Source: Mushrooms of North America by Roger Phillips.