sampleFly agaric (Amanita muscaria) at three growth stages, Germany: warted round buttons opening to the flat scarlet cap. Note the white stem, skirt-like ring, and white wart flecks -- remnants of the universal veil. Holger Krisp ·CC BYsampleMature Amanita muscaria, Scotland: fully flattened red cap with white gills, white stem, and hanging ring. Rain can wash the white warts off older caps, as here -- the ring and white gills still identify it. Tim Bekaert ·Public domainsampleCap surface of Amanita muscaria in close-up: cottony white veil warts on scarlet skin. A. pantherina, its more toxic lookalike, has the same warts on a brown cap -- cap color plus warts is the key pairing. MichaelMaggs ·CC BY-SA