Arched Earthstar
Geastrum fornicatum · Family Geastraceae · Updated October 2026
56US records
16states
Decbusiest month
56 US records since 1896 (9 in the last 10 years)
Last seen Oct 13, 2024 (about 2 years ago) near Harker Heights, Bell County, TX, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from California, Texas and New Mexico, and the busiest months are Dec, Feb 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
Records by month, all years. Busiest: Dec, Feb, Jan.
Top counties
- Alameda County, CA (9) · latest Jan 16, 2019
- Travis County, TX (4) · latest Mar 2, 1903
- Lincoln County, NM (3) · latest Apr 21, 1940
- Madera County, CA (3) · latest Feb 23, 1979
- Los Angeles County, CA (3) · latest Jan 15, 1921
- Hawaii County, HI (2) · latest 1930-04
- Hampton County, SC (2) · latest Oct 26, 2020
- San Francisco County, CA (2) · latest Jan 17, 2024
- Torrance County, NM (2) · latest Apr 21, 1942
- Santa Clara County, CA (2) · latest Jan 25, 1933
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.