Teonanácatl vs Philosopher's Stone
Psilocybe mexicana compared with Psilocybe tampanensis — how to tell them apart in the field.
This is a dangerous confusion.
At least one of these species is toxic. Never eat a wild mushroom based on a photo comparison alone — verify with local experts.
Teonanácatl / Mexican Magic Mushroom
Psilocybe mexicana
ToxicPsychoactive
Philosopher's Stone / Magic Truffle
Psilocybe tampanensis
ToxicPsychoactive
How to Tell Them Apart
Similar small size and also produces sclerotia, but grows at high elevations in Mexican cloud forests. Has a more conical cap shape. Both contain psilocybin.
Side-by-Side Identification
| Trait | Teonanácatl | Philosopher's Stone |
|---|---|---|
| Cap | 1-3 cm across. Conical to campanulate (bell-shaped), sometimes with a small umbo. Straw-yellow to brown, darker when moist, paler when dry. Surface smooth, slightly hygrophanous. Margin sometimes slightly translucent-striate when wet. | 1-2.4 cm across. Convex to plane, sometimes with a slight umbo. Ochraceous-brown to straw-colored, paler when dry. Smooth, slightly sticky when moist. Hygrophanous. |
| Gills | Adnate to adnexed, moderately spaced. Gray to purple-brown at maturity. Edges whitish. | Adnate, medium-spaced. Brown to dark purple-brown with age. Edges lighter. |
| Stem | 4-12 cm tall, 1-3 mm thick. Thin, wiry, and flexible. Yellowish to reddish-brown, darker toward the base. Hollow. May show faint blue-green bruising when handled. | 2-6 cm tall, 1-2 mm thick. Thin, equal. Yellowish-brown, slightly darker at the base. Bruises blue when handled. |
| Spore print | Dark purple-brown. | Purple-brown to dark purple-brown. |
| Bruising | Blue-green bruising on stem and cap when damaged, though often faint. Indicates presence of psilocybin. | Blue-green bruising on stem and cap, sometimes slow to develop. Sclerotia also bruise blue when cut. |
| Habitat | Grows in small groups on mossy, grassy slopes and trails in subtropical cloud forests, often among mosses and grasses at elevations of 1,000-1,800 meters. Also found in meadows and roadsides at the margins of forests. Occasionally in disturbed grassy areas. | The single wild collection was from a sandy meadow in a deciduous area. In cultivation, sclerotia form readily in grain or grass seed substrates. The natural habitat preferences remain poorly understood due to the extreme rarity of wild collections. |
| Season | May through October, corresponding with the rainy season in southern Mexico and Central America. Peak fruiting in June through August. | The only wild collection was made in September. In cultivation, sclerotia form year-round under controlled conditions. |
Found one of these in the wild? Don't rely on memory — identify it from a photo with Orangutany and check it against both species before you touch it.