Your resource for fungi information
Russula claroflava   (Yellow Swamp Brittlegill)
North America, Europe
Cap 4-10 cm diameter, stem 4-10 cm tall * 1-2 cm thick

Russula claroflava, also known as Yellow Swamp Brittlegill, is a brightly coloured agaric that has a convex to flat, vivid yellow cap. It grows with birch in very damp or boggy woodland.

Cap bright yellow in colour, which diminishes with age, and slightly sticky when damp. It has thin, smooth skin that can easily be peeled off and often a depressed center. Gills at first white, then creamy yellow. Older ones can have grey or black edges, more or less free or reaching but not connected to the stem and fairly crowded. Stem is white, turns grey with age, more or less equal, fairly stout, and smooth. The mushroom has no ring.

Similar species include other Russula species. Russula ochroleuca has a green tinge on the cap. Russlula ochroleucoides is a bitter-tasting American equivalent, growing in East Coast oak woods.

Russula claroflava on the 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.