Your resource for fungi information
Marasmius oreades   (Fairy Ring Marasmius)
North America, Europe, East Asia
Cap 2-5 cm diameter, stem 2-10 cm tall * 0.3-0.5 cm thick

Marasmius oreades, also known as Fairy Ring Marasmius, is a small agaric which is producing characteristic rings in lawns. It has a bell-shaped to convex cap, which becomes flatter with a broad umbo with age. The mushroom belongs to the family Marasmiaceae which contains about 500 species of agarics, of which a few, such as Marasmius oreades, are edible.

Cap at first convex, then flat to cup-shaped with a low central hump that is often a darker shade. Colour varies from light beige to brown yellow. The margins are usually crinkled and almost transparent and streaky in damp weather. They turn lighter in dry weather and regain their colour in more humid conditions. The flesh is whitish buff, thick at the center, otherwise thin. Gills free, sparse, and convex in the center with horizontal ridges. Creamy white at first, becoming ochraceous cream, fairly broad and distant. Spores off-white. Stem tall, coloured as the cap, smooth or finely scurfy, slender, more or less equal, whitish downy at the base and slightly rooting, stiff. The mushroom has no ring.

Similar species include the poisonous Clitocybe dealbata which is found in the same grassy habitat. It is distinguished by its decurrent gills. Another one is the very poisonous mushroom Clitocybe rivulosa and the inedible Agrocybe pediades. Similar species also include other species in the Marasmius genus, like Marasmius vagus.

Marasmius oreades on the First Nature Web site.
Marasmius oreades on the Web site.
Marasmius oreades on the MushroomExpert.Com Web site.

Cookie notice

We use cookies to improve your experience on our site and to show you relevant advertising, as well as to analyze traffic.

Learn more about cookies


If you plan to collect fungi to be eaten, misidentified mushrooms can make you sick or kill you. Never eat a mushroom that you are not 100% sure is edible. Use many resources, and be skeptical of your own conclusions. Please consider that many mushrooms take years of experience to identify reliably.

The site takes no responsibility for damage caused by ingesting poisonous mushrooms. If you continue, you agree to view this website under these terms.