Panaeolus subalteatus
This mushroom is listed first because it is the most common and widely distributed psilocybin mushroom. Found from spring to autumn alone or clustered in freshly installed lawns, straw
piles, all types of compost, and dung piles in all 50 states and every country in the world. They grow in large numbers on the manure compost piles that are nearby any stable, race track or place where horses are kept.
Conocybe cyanopus
Rarely found in cool climates of North America and Europe in May through September usualy in dense shade scattered among mosses, and in wet soil around bogs, swamps, ditches, in lawns, fields, and grassy areas. Difficult to safely identify as similar looking Conocybe species are deadly.
Panaeolus cyanescens
Found in early summer through late autumn scattered, grouped, or clustered on cow dung, or rich soil in tropical areas such as Mexico and Hawaii as well as Florida and other southern states. Fruits earlier in the season than P. cubensis.
Panaeolus sphinctrinus
Found in summer and autumn in small groups in forests, pastures, fields, and roadsides almost always on cow dung in many temperate parts of the world. Weakly active. Many Panaeolus species look similar; some are active and none are known to be toxic.
Psilocybe baeocystis
Found in autumn and winter, solitary, grouped, or clustered on earth, lawns, mulch, and decomposing forest wood near scattered trees especially conifers -- in western Oregon and Washington. It was once found in Maine.
Psilocybe caerulescens
Found in the summer during rainy season, grouped or clustered but rarely solitary, mostly in shady places on soil, sugar cane mulch, recently turned earth or stream banks -- in Mexico and once in Alabama and northern Florida. The Mexican variety P. caerulescens var. mazatecorum is known locally as "Durrumbe", which means "landslides." There it is often found in the middle of dry river beds, among landslides, and near corn or coffee plantations.
Psilocybe caerulipes
Very rarely found in summer and occasionally autumn solitary or clustered on decomposing logs and debris of hardwood trees (especially birch and maple) in New York, New England states, Ohio, Michigan, North Carolina, Tennessee and Ontario.
Psilocybe cubensis
Found from February to November growing directly from on cow or horse dung, in rich pasture soil, on straw, or on sawdust/dung mixture in Mexico, Cuba, Florida and most other other southern US states and tropical countries.
Psilocybe azurescens
Found in autumn scattered, grouped, or clustered in woods, on earth, among leaves and twigs, and occasionally on decomposing wood -- in northwestern USA.
Psilocybe cyanescens
Found in autumn scattered, grouped, or clustered on wood chips, among leaves and twigs, and occasionally on decomposing logs -- in northwestern USA. In California it fruits September through January and its range extends from the northern border south to Santa Cruz.
Psilocybe mexicana
Common from May to August in Mexican meadows and fields where animals graze.
Psilocybe ovoideocystidiata
Common in the Ohio River Valley from April 15 to June 15. Has been found in Pennsylvania, SW Michigan, Ohio, West Virginia and New Jersey.
Psilocybe pelliculosa
Found September to December scattered, grouped, or clustered on humus and debris, in or near conifier forests in northwestern USA and as far south as Marin County, California.
Psilocybe quebecencis
Found from summer to late October scattered in shady areas at forest edges, on sandy soil containing vegetable debris regularly inundated by river flooding, and on decomposing wood and debris (especially birch, alder, fir, and spruce) in the Quebec area.
Psilocybe semilanceata
Found among grasses, in clearings, pastures, meadows, forest edges, open conifier woodlands, and on roadsides -- but never on dung -- in New York, northern USA, British Columbia, and Europe. In the U.S., the season starts August through December (with the main season being in October and November). In Europe the season is September through November, starting earlier farther north and at lower elevations.
Psilocybe strictipes
Found in October rather clustered on soil or on decomposing wood and debris, on conifiers and some other trees in northwestern USA (especially in Oregon).
Psilocybe subaeruginascens
Found from southern California to Washington and also Japan and Java. It resembles and shares similar wood chip habitats with Psilocybe cyanescens however it fruits in warmer weather and is often found after spring rains.
Psilocybe subaeruginosa
Found in fall and winter from April to as late as October usually solitary or gregarious, sometimes in clusters. It occurs in a variety of habitats containing decomposing wood such as the floors of Pinus spp. forests, woodchipped landscape garden beds, rotting eucalypt mulch, amongst grass, native bushland and forests and even from moss. Only in occurs in Australia and New Zealand where it is common.
Psilocybe sylvatica
Found in September and October in small compact but unclustered groups in woods on leaf mold, debris (especially beech wood), around stumps and logs, but not usually on them -- from New York to Michigan and as far north as Quebec and Ontario. This mushroom is small and is often mistaken for P. pelliculosa.
