Agaricus cyanescensCopelandia anomalaCopelandia cyanescensCopelandia papilonaceaCopelandia westii Panaeolus cyanescens[1] is a mushroom in the Bolbitiaceae family.

It is also known under the common names of Blauender Düngerling, blue meanies, faleaitu (Samoan), falter-düngerling, Hawaiian copelandia, jambur, jamur, pulouaitu (Samoan), taepovi (Samoan), tenkech (Chol).

[2] Panaeolus cyanescens is a coprophilous (dung-inhabiting) species which occurs in both the Neotropics and Paleotropics.

It has been found[3] in Vietnam, Africa (including South Africa, Madagascar and Democratic Republic of the Congo), Australia, Belize, the Caribbean (Bermuda, Grenada, Barbados Jamaica, Trinidad, and Puerto Rico) Costa Rica, India, Malaysia, Indonesia, Sri Lanka, Cambodia, Thailand, Japan, Mexico, Oceania (Fiji and Samoa), the Philippines, South America (Bolivia, Brazil, Paraguay, Colombia, Venezuela, and Ecuador), South Korea, and the United States (California, Hawaii, Louisiana, Mississippi, Alabama, Florida, Tennessee, Texas, Kentucky, Virginia, and North Carolina).

Laussmann & Sigrid Meier-Giebing (2010) reported the presence of psilocybin at 2.5% and psilocin at 1.194% average from 25 samples seized by German customs that were shipments from commercial growers (making modern commercially cultivated strains of this species the most potent hallucinogenic mushrooms ever described in reputable published research).