How to tell Parasol mushroom from Lepiota helveola

Cap large, 10-25 cm across. Egg-shaped at first, then opening out flat like an umbrella, with a small blunt bump in the center. The background color is light gray to grayish brown, and the surface is covered with large brown or grayish-brown scales in concentric rings; the center is darker and smoother. The skin peels easily away from the flesh.

The cap is small: 2-5 cm across, hemispherical when young, later becoming convex to flattened with a small bump in the center. Cream or pale ochre, with characteristic pinkish-brown or ochre-brick scales, scattered irregularly or in concentric rings. The scales are denser in the center of the cap. The surface beneath the scales is smooth.

Gills. The gills are crowded, thin and free (they don't touch the stem) — an important feature of the genus. White at first, turning cream to yellowish with age. Spore print white.

Gills. The gills are crowded, thin, free (not attached to the stem). White to cream. The spore print is white — a critical feature for telling it apart from Agaricus (theirs is blackish-brown).

Stem tall, up to 30 cm high, 1-1.5 cm thick, cylindrical, with a bulb up to 2.5 cm at the base (no volva — this is crucial!). Gray-brown with a distinctive “snakeskin” zigzag pattern of darker scaly patches — a diagnostic feature. Near the top there is a fleshy movable ring (you can slide it up and down), whitish above, with a brown edge below.

Stem 3-6 cm tall, 0.3-0.7 cm thick, cylindrical, slender. Whitish in the upper part, and lower down with pinkish-brown tones. The ring is absent or present as a thin, indistinct band — practically invisible in mature mushrooms. The stem flesh is thin, hollow in old mushrooms.

The flesh in the cap is white, soft, juicy in young ones, softer and a bit limp in old ones. When cut, it stays white and does not change color — an important difference from similar species. The flesh in the stem is tough and fibrous — not edible.

Flesh thin, white, with a pink tint at the base of the stem. It doesn't change color quickly when cut.

A pleasant nutty smell with a subtle mushroomy note. The taste is mild and delicately nutty — especially when fried.

Faint and neutral, or with a note of raw dough. Nothing alarming. The taste is mild. Neither smell nor taste hints at deadly toxicity — the treachery of amatoxin mushrooms lies in the absence of any sensory warning.