Cap: 4-10 cm broad. Hemispherical to broadly convex, whitish
at first becoming silvery whitish-grayish with age, sometimes appearing
slightly yellowish, a bit rare for yellow. Surface very smooth to rimose-scaly.
Flesh is very thick and whitish.
Gills: Adnexed to adnate, close and broad and slightly swollen
in the center. Whitish to grayish at first and then becoming dark to
mottled black. Egdes of gills are whitish-gray.
Stem: 40-200 mm long by 5-15 mm thick. Equal to slightly enlarged
and curved at the base and solid but sometimes is twisted. Very whitish
in color and the surface is smooth and striate towards the base.
Spores: 18-20 x 11-12.5µ. and are ellipsoid in shape.
Sporeprint: Black in deposit.
Habitat:Gegarious to subcespitose in manure of cattle, gaur,
water buffalo, sheep and sometimes horses. And many other four-legged ruminants.
Distribution: Widely distributed with a cosmopolitan distribution.
Season: In the spring and fall and during the rainy seasons.
The author has found this species to be common in Thailand and Cambodia as well
as Florida and other regions of the USA and Europe.
Dosage: This species is not psychoactive.
Comment: In the late 1940s this species gained a reputation in Australia as the 'Hysteria Fungus' allegedly causing accidental hallucinogenic inebriations in foragers in some parts of that country. Later it was determined that the actual causative mushrooms were Copelandia cyanescens which is macroscopically similar in appearence to Panaeolus antillarum. This species is edible but it's bitter rancid taste is not worth eating.