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Greenfoot Fibrecap

Inosperma calamistratum · Family Inocybaceae · Updated October 2026

217US records

20states

Julbusiest month

217 US records since 1902 (35 in the last 10 years)

Last seen Jul 30, 2025 (about 15 months ago) in Monongahela National Forest, WV, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from Washington, North Carolina and California, and the busiest months are Jul, Aug and Oct. (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: Jul, Aug, Oct.

Where it's recorded

State	Records	Latest sighting
Washington	61	Jun 7, 2020
North Carolina	36	Aug 25, 2023
California	27	Dec 22, 2023
Pennsylvania	15	Aug 4, 2024
Oregon	14	Jun 12, 2022
Michigan	9	Aug 6, 1967
New York	9	Aug 9, 2019
Vermont	9	Jul 21, 2024
Tennessee	9	Jul 30, 2017
West Virginia	6	Jul 30, 2025
Maine	4	Jul 23, 1993
Massachusetts	4	Sep 21, 2004

Top counties

Humboldt County, CA (19) · latest Dec 22, 2023
Pierce County, WA (16) · latest Sep 23, 1960
Macon County, NC (14) · latest Jul 26, 2021
Swain County, NC (10) · latest Jul 8, 2021
Snohomish County, WA (10) · latest Oct 22, 1980
Grays Harbor County, WA (9) · latest Oct 14, 1993
King County, WA (8) · latest Oct 18, 1980
Tillamook County, OR (7) · latest Oct 23, 1993
Thurston County, WA (7) · latest Jun 7, 2020
Yancey County, NC (7) · latest Sep 24, 2021

Bring along

🍄

Regional mushroom field guideSee on Amazon

🍄

Folding mushroom knife with brushSee on Amazon

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Wicker foraging basketSee on Amazon

🍄

10x hand lens / loupeSee on Amazon

🍄

Spore print paperSee on Amazon

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