
Jackson's slender amanitaAmanita jacksonii
American slender Caesar · Yema (Mexico) · K’antsu (Chamula) · Níẗ kua´ yöö (Santiago Comaltepec) · Hongo amarillo (Tziscao)
Amanita jacksonii, known in Mexico as yema, is a wild edible mushroom in the Amanita caesarea complex with documented traditional consumption in Mexico. Its Mexican records and resemblance to toxic Amanitas make expert identification essential before eating it.[2][3][7][18]
Edible with caution. Eat it only well cooked and with a sure ID. Never eat a wild mushroom identified only from photos.
- Season in Mexico
- HabitatOak and pine forests
- FamilyAmanitaceae
How do you identify Jackson's slender amanita?




- Cap
- Convex with a central bump. Smooth, slightly sticky surface, deep reddish orange at the center and orange toward the lined margin.[3]
- Diameter
- Cap 5–12 cm across.[1]
- Gills
- Yellow gills.[5]
- Stem
- 8–15 cm long and 1–2 cm thick; yellow with orange to reddish fibers.[1]
- Ring and volva
- Yellow to orange ring. White, sacklike volva, 4–8 cm high.[1]
- Flesh
- Whitish to pale yellow; stays the same color when cut.[1]
- Spore print
- White.[1]
Can you eat Jackson's slender amanita?
Traditional consumption is documented in Mexico. Eat it only after an expert identifies the specimens. Cook it thoroughly and avoid eating it raw, following general guidance for wild mushrooms. Pay special attention to deadly white Amanitas such as Amanita bisporigera. Toxins in dangerous species can remain active after cooking.[7][12][13][16]
Where and when does Jackson's slender amanita grow?
Forms mycorrhizal associations with oaks and pines. A Guerrero specimen was recorded in montane cloud forest.[1][19]
In Chamula, Chiapas, it is reported from late May through June and part of July. This calendar applies to that locality.[6]
Published records under this name cover these states. Its range extends to at least the State of Hidalgo, Mexico.[1][3][6][19]
Names in Mexico
About the name
It belongs to the Amanita caesarea complex. MushroomExpert notes that Mexico has cryptic species with nearly identical appearances; records under Amanita jacksonii need to be understood in that taxonomic context.[1][3]





