Cucumber Cap
Macrocystidia cucumis · Family Macrocystidiaceae · Updated October 2026
58US records
13states
Octbusiest month
58 US records since 1916 (26 in the last 10 years)
Last seen Sep 10, 2026 (about 7 weeks ago) near Holt, Ingham County, MI, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from California, Washington and Oregon, and the busiest months are Oct, Dec and Nov. (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: Oct, Dec, Nov.
Where it's recorded
Top counties
- San Francisco County, CA (14) · latest Feb 4, 2024
- King County, WA (6) · latest Dec 20, 2025
- Lane County, OR (4) · latest Oct 26, 2023
- Washington County, OR (4) · latest Dec 11, 2025
- Orange County, NC (3) · latest May 12, 1989
- Whatcom County, WA (3) · latest Oct 1, 2023
- Humboldt County, CA (2) · latest Nov 8, 1986
- Franklin County, OH (2) · latest May 8, 2020
- Marion County, OR (2) · latest Oct 12, 2018
- Montgomery County, VA (2) · latest Nov 22, 1974
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.