The Panaeolus Cambodginiensis is probably the most active panaeolus mushroom species of this genera. It was absent from the mushroom community for many years until entheo-mycologist John Allen found some specimens in Cambodia. It wasn't to long after, this great strain from Thailand surfaced. This particular strain has a nick name of "Goliath" as it's caps tend to be larger then other panaeolus strains. The Panaeolus Cambodginiensis is macroscopically identical to the panaeolus bispora and grows in the same conditions as the other active panaeolus mushrooms. In nature they grow on the dung in grassy pastures of water buffalo, cattle and horses in tropical and subtropical climates. Although they have been reported in other climates as well. This species is thought to be spread through SE Asia subtropics and was reported by John Allen from the island of O'ahu Hawaii in 1993. This species is also found in Florida and Mexico. 

The panaeolus species also shows up in some books as copelandia instead of Panaeolus name. Copelandia refers to panaeolus from tropical regions. This species is an excellent choice for ranches and farmlands as it's a quick dung decomposer. The fungi can break the dung down into rich composted soil, which feeds the grass that the livestock grazes on. The spores are deposited on the grass, which is then eaten by the livestock and deposited around the farm and fungi life cycle continues. Many ranchers have noted the dung smell is reduced when this fungi is present on the land.

An interesting note about the spores and gills of panaeolus mushrooms. This species is known to have a spotted appearance on their gills just prior to being fully mature. This is caused by an uneven ripening of the spore-producing cells (called basidia) on the gill surface.

Microscopic Features: SPORES are blackish in deposit, smooth, lemon shaped, 11-16 by 7.5-11 µ. Basidia 4-spored, rarely 2-spored. Cheilocystidia irregular in form. Pleurocystidia absent. Sprint prints are clean and printed on foil.