How to Identify Fairy Ring Mushroom, Merry Mushroom

Scientific Name: Marasmius oreades

Fairy Ring Mushroom (Marasmius oreades) identification
Image source: MushroomObserver (CC BY-SA 3.0)

✅ Edibility Note

While Marasmius oreades is edible, it is essential to correctly identify it as some lookalikes can be toxic. Always consult a local expert or reliable field guide before foraging.

Description

Marasmius oreades is a small to medium-sized mushroom characterized by its brown to yellowish cap that can reach up to 5 cm in diameter. The cap is convex to flat and often has a smooth surface with a slightly striated margin. The gills are free and closely spaced, and the stem is slender and often has a bulbous base.

Key Identification Features

Field marks recorded for this species. Work through all of them, not just one:

Habitat & Distribution

Habitat: Typically found in grassy areas, often in rings or arcs, especially in meadows and pastures.

Region: Widely distributed across North America, Europe, and parts of Asia.

Seasonality

Fruits from late spring to early autumn.

Typical months: May-Oct

Common Lookalikes

Always verify identification to avoid these similar species:

Related Species

Browse all species in the Mushroom Database →

Track Your Fairy Ring Mushroom Finds

Pin the patch before you leave it. Coordinates, photos, and field notes stay AES-encrypted on your device — and the offline lookalike guide travels with you into the deep woods.

Download Mushroom Tracker

Disclaimer: This guide is for educational purposes only. Never consume a wild mushroom unless you are 100% certain of its identification.