Agaricus campestris

Meadow Mushroom

Beneficial

HabitatOn rich grassland — pastures, meadows, and lawns — often in rings after late-summer and autumn rain; a grassland saprotroph.

Background

The meadow mushroom is the wild relative of the cultivated white button and grows in the same grassy places, appearing in troops and rings on pastures and lawns after rain. It has a white to buff cap, a stem with a ring, and gills that are a distinctive bright pink when young, darkening through chocolate-brown to nearly black as the spores mature — never white at maturity.

Those pink-to-brown gills and the brown spore print are the features that matter for safety, because the mushrooms it is most dangerously confused with — the destroying angel and other white amanitas — have gills that stay pure white and a stem base sitting in a cup-like volva. The green-spored parasol, another grassland hazard, drops a green print. A gardener's discipline with any meadow mushroom is to check that the gills are pink then brown (not white), that there is no volva at the base, and that the spore print is brown.

Beneficial — decomposer

Decomposes organic matter in grassland and lawn soils, recycling nutrients through pasture and turf. A common, useful decomposer of rich open ground.

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