Discrete Webcrust
Mutatoderma mutatum · Family Hyphodermataceae · Updated October 2026
128US records
30states
Sepbusiest month
128 US records since 1888 (1 in the last 10 years)
Last seen Apr 27, 2020 (about 6 years ago) near Cross Plains, Dane County, WI, a preserved specimen in University of Illinois, Illinois Natural History Survey Fungarium - Fungi. Most US records come from New York, Illinois and Pennsylvania, and the busiest months are Sep, Oct and Aug. (Data as of October 26, 2026; records can lag by weeks.)
⚠ Never eat a wild mushroom based on this site. We show where fungi have been recorded, nothing more. We never say any mushroom is edible or safe, and you shouldn't decide that from any website, app or photo. Many deadly mushrooms look like harmless ones. If someone may have eaten a wild mushroom, call Poison Control at 1-800-222-1222 right away.
Lookalike warning. Many mushrooms, including deadly ones, closely resemble each other, and the only reliable identification comes from an expert looking at the actual specimen (often with spore prints or microscopy). Never use a name, photo or record count on this page to decide what something is.
When it's recorded
Records by month, all years. Busiest: Sep, Oct, Aug.
Where it's recorded
Top counties
- Cook County, IL (8) · latest Mar 27, 1909
- Bonner County, ID (8) · latest Oct 12, 1920
- Dane County, WI (7) · latest Apr 27, 2020
- Albany County, NY (7) · latest Oct 1, 2000
- Tompkins County, NY (6) · latest Sep 5, 1952
- Addison County, VT (4) · latest Aug 1, 1896
- Onondaga County, NY (4) · latest 1889-10
- Champaign County, IL (4) · latest Dec 12, 1973
- Sevier County, TN (4) · latest Sep 13, 1988
- Orange County, NC (4) · latest Jan 19, 1921
More on this species from GBIF.
Bring along
🍄
Regional mushroom field guideSee on Amazon🍄
Folding mushroom knife with brushSee on Amazon🍄
Wicker foraging basketSee on Amazon🍄
10x hand lens / loupeSee on Amazon🍄
Spore print paperSee on AmazonAs an Amazon Associate we earn from qualifying purchases.