Oiled Crust
Gloeocystidiellum porosum · Family Stereaceae · Updated October 2026
51US records
18states
Sepbusiest month
51 US records since 1901 (1 in the last 10 years)
Last seen Oct 21, 2019 (about 7 years ago) in Allegany State Park, NY, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from Oregon, Florida and Connecticut, and the busiest months are Sep, Aug and Jul. (Data as of October 26, 2026; records can lag by weeks.)
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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, Aug, Jul.
Where it's recorded
Top counties
- Capitol Planning Region, CT (5) · latest Aug 28, 1938
- Clearwater County, MN (4) · latest Aug 20, 1970
- Seminole County, FL (3) · latest Sep 18, 1961
- Yancey County, NC (3) · latest 1901-09
- Alachua County, FL (2) · latest Jul 17, 1970
- San Juan County, CO (2) · latest Sep 14, 1985
- Jackson County, OR (2) · latest 1958-06
- Benton County, OR (2) · latest Jun 20, 1958
- Coos County, OR (2) · latest Jun 27, 1958
- Blount County, TN (2) · latest Jul 27, 1977
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.