Illinois Mycological Association

Celebrating 52 Years! 1973-2025

About UsHow to Join

The Illinois Mycological Association is a group of fungal enthusiasts that meets frequently to learn about fungi through talks presented by experts, and to look for, identify and document wild fungi. We host monthly meetings with invited speakers, mycologist-led surveys to gather and document fungi, and an annual show at the Chicago Botanic Garden.

We welcome you to attend and learn more about fungi and the wild mushrooms of Illinois and the Chicago region.


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November Mushroom of the Month: Collybia nuda \\ Wood Blewit

Collybia nuda are some of the last fleshy fungal fruiting bodies to appear in the autumn mushroom season, especially in the southern part of our state. A saprotrophic species, they can be found emerging in small troops or loose clusters among fallen leaves and decaying matter in both coniferous and deciduous woods. These mushrooms are typically a lilac hue which can range from purple to a pale pinkish-buff. The white-spored gills are attached to a short stem and many people describe them as having a pleasant, almost fruity orange juice odor.

Often sought after by foragers, like any wild edible mushroom, C. nuda should be properly cooked as they’ve been known to cause gastric upset when consumed raw. Also keep in mind that some Cortinarius species can be mistaken for C. nuda but unlike their lookalikes, C. nuda don’t have webby gill coverings, veil remains, rings on their stems nor brown or rust-colored spores.

This beautiful fungi is also one of the many types of mushrooms that’s been found growing in a fairy ring and have apparently also been seen decorating the bowers of Australia's Satin Bowerbirds who collect and arrange blue objects, such as berries, flowers, and in some cases, the wood blewit mushroom, to attract females.

Text by Liz Weinstein, Images: Collybia nuda photo by Jimmie Veitch, Fairy Ring Under Oak by Kevin Sharp, Satin Bowerbird at His Bower by Joseph C. Boone.

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Video by the Illinois Mycological Association.

Speakers: Patrick Leacock, Tom Volk, and Britt Bunyard.
Video created by James Strzelinski, Spiel.

Interview assistance by Rebecca Fyffe.

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IMA on iNaturalist

Members of the Illinois Mycological Association post their mushroom photos to iNaturalist to record fungal diversity for the Chicago Region. Mycologist Patrick Leacock reviews a selection of recent observations organized by his Top Ten Lists of most common macro-fungi.

IMA on iNaturalist

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