Sulphur Tuft
Hypholoma fasciculare · Family Strophariaceae · Updated October 2026
1,675US records
43states
Octbusiest month
1,675 US records since 1887 (1,004 in the last 10 years)
Last seen Oct 4, 2026 (about 3 weeks ago) in Shasta National Forest, CA, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from California, New Jersey and Washington, and the busiest months are Oct, Nov and Dec. (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 Hypholoma includes sulphur tuft and relatives. 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: Oct, Nov, Dec.
Where it's recorded
Top counties
- Marin County, CA (112) · latest Dec 28, 2025
- San Mateo County, CA (81) · latest Feb 10, 2026
- Humboldt County, CA (74) · latest Sep 20, 2026
- Sonoma County, CA (68) · latest Jan 31, 2026
- Santa Cruz County, CA (63) · latest May 27, 2026
- Alameda County, CA (57) · latest Jan 18, 2026
- Contra Costa County, CA (49) · latest Jan 4, 2026
- Santa Clara County, CA (46) · latest Dec 30, 2025
- Lane County, OR (40) · latest Oct 16, 2025
- San Francisco County, CA (37) · latest Nov 29, 2025
More on this species from GBIF.
Bring along
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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.