Chlorophyllum rhacodes is the shaggy parasol, a large white-spored agaric. Its brown button cap breaks into shaggy, brown-tipped scales over a whitish background, leaving a smooth brown center. The flesh turns pinkish-orange to reddish when cut, especially at the stem apex, then slowly brownish. It has a smooth stem with a basal bulb and a thick, double-edged, movable ring. It lacks the brown-banded stem of the parasol mushroom, Macrolepiota procera.
Edible when cooked, but it causes gastric upset in some people, and some have strong allergic reactions to all Chlorophyllum species. It must be told apart from the poisonous C. molybdites, the leading cause of mushroom poisoning in North America: always take a spore print, which is white here and green in C. molybdites. C. brunneum is considered toxic in some countries.
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Habitat
Saprobic; alone, scattered or in troops and fairy rings in lawns, gardens, roadsides, field edges and other disturbed ground, often near conifers, especially spruce. Prefers some shade. Spring through fall.
Distribution
Widespread in North America, more common from the Rocky Mountains eastward; also Europe and southern Africa.
Characteristics
Cap: 5-16 cm, nearly round to convex, becoming flat; brown to orangish-brown in the button stage, breaking into shaggy brown-tipped scales over a whitish background; center stays smooth. Gills: free, close, white becoming pale brownish, often with brownish edges. Stem: 6-21 cm x 1.5-3.5 cm, club-shaped with a gradually swollen basal bulb, whitish above the ring and brownish below, bruising brown; ring high, double-edged and movable. Flesh: whitish, turning pinkish-orange to reddish when cut, then brownish. Spore print: white. Spores: 8-12 x 5-8 um, ellipsoid, dextrinoid.