Home › Species › Conocybe rugosa

Conocybe rugosa

Family Bolbitiaceae · Updated October 2026

101US records

14states

Marbusiest month

101 US records since 1902 (77 in the last 10 years)

Last seen Mar 20, 2026 (about 7 months ago) near Cutten, Humboldt County, CA, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from California, Virginia and Washington, and the busiest months are Mar, Oct and May. (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.

☠ Dangerous genus. The genus Conocybe includes species containing amatoxins. Mushrooms in this group have caused serious or fatal poisonings.

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: Mar, Oct, May.

Where it's recorded

State	Records	Latest sighting
California	38	Mar 20, 2026
Virginia	19	Oct 25, 2024
Washington	11	May 16, 2017
Pennsylvania	10	Sep 21, 2024
New York	7	May 20, 2024
Maryland	4	Oct 14, 2022
North Carolina	2	May 19, 2023
Michigan	2	1919-10
Wisconsin	2	Oct 28, 2023
Tennessee	2	Nov 17, 2009
Oregon	1	Feb 4, 1998
Massachusetts	1	–

Top counties

Fairfax County, VA (16) · latest Oct 31, 2023
San Francisco County, CA (9) · latest Mar 6, 2019
King County, WA (9) · latest May 14, 1999
Humboldt County, CA (8) · latest Mar 20, 2026
Santa Cruz County, CA (6) · latest Aug 17, 2025
Montgomery County, MD (4) · latest Oct 14, 2022
Somerset County, PA (4) · latest Sep 1, 2024
Alameda County, CA (3) · latest Feb 15, 2025
Santa Clara County, CA (3) · latest Dec 25, 2024
Chippewa County, MI (2) · latest 1919-10

Bring along

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Folding mushroom knife with brushSee on Amazon

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Wicker foraging basketSee on Amazon

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10x hand lens / loupeSee on Amazon

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Spore print paperSee on Amazon

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