Kauffman's Milk Cap
Lactarius kauffmanii · Family Russulaceae · Updated October 2026
80US records
7states
Novbusiest month
80 US records since 1934 (9 in the last 10 years)
Last seen Oct 14, 2025 (about 12 months ago) near Shelton, Mason County, WA, a preserved specimen in INSDC Sequences. Most US records come from California, Washington and Alaska, and the busiest months are Nov, Oct and Sep. (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: Nov, Oct, Sep.
Where it's recorded
| State | Records | Latest sighting |
|---|---|---|
| California | 41 | Nov 21, 2023 |
| Washington | 26 | Oct 14, 2025 |
| Alaska | 6 | Sep 7, 2014 |
| Oregon | 3 | Oct 29, 2021 |
| Idaho | 2 | Oct 12, 1956 |
| North Carolina | 1 | Aug 16, 2016 |
| Maine | 1 | Jul 19, 1962 |
Top counties
- Mendocino County, CA (34) · latest Nov 21, 2023
- Clallam County, WA (9) · latest Oct 19, 2001
- Pierce County, WA (5) · latest Oct 9, 2014
- Sitka City and Borough, AK (4) · latest Sep 22, 2009
- Grays Harbor County, WA (3) · latest Sep 28, 2024
- Trinity County, CA (2) · latest Nov 27, 1986
- Lincoln County, OR (2) · latest Oct 29, 2021
- Whatcom County, WA (2) · latest Nov 25, 2009
- King County, WA (2) · latest Nov 1, 2003
- Humboldt County, CA (2) · latest Nov 21, 2021
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.