Mushroom Sightings
Mushroom Sightings
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Lactarius substriatus

Lactarius substriatus (Lactarius substriatus), photo
Photo: reagan peschke, CC BY 4.0 · iNaturalist
Family Russulaceae · Updated October 2026
81US records
4states
Novbusiest month
81 US records since 1962 (18 in the last 10 years)

Last seen Dec 6, 2025 (about 11 months ago) near Fort Lewis, Pierce County, WA, a preserved specimen in INSDC Sequences. Most US records come from California, Washington and Oregon, and the busiest months are Nov, Dec and Jan. (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

Jan7Feb2Mar0Apr1May0Jun0Jul0Aug0Sep0Oct6Nov40Dec24

Records by month, all years. Busiest: Nov, Dec, Jan.

Where it's recorded

StateRecordsLatest sighting
California51Jan 17, 2025
Washington26Dec 6, 2025
Oregon3Nov 6, 2021
Arizona1–

Top counties

More on this species from GBIF.

Bring along

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Regional mushroom field guideSee on Amazon
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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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