Psilocybe cyanescens - Photograph and description. Gaston Guzman - Dr. Gaston Guzman is the foremost authority in the world on the genus Psilocybe. Article on his work, with illustrations of several species. Stropharia - Several photographs of colorful members of this genus. California Fungi: Hypholoma - The principal characteristics of the genus Hypholoma and a list of those species found in California, with photographs of 3 of them. California Fungi: Stropharia - A list of those species in this genus to be found in California with photographs of 4 of them. California Fungi: Psilocybe - A list of those species in this genus to be found in California with photographs of 4 of them. California Fungi: Hypholoma fasciculare - Photograph and description of this species. Psilocybe cubensis: Cow Patty Mushroom - Research project by Drew Anderson on this psychedelic fungus, including its classification, habitat, reproduction, adaptations, nutrition, interactions with other species and effects on humans. Gallery of Psilocybe Mushrooms - Paul Stamets provides a number of photographs of members of this genus with information on their habitats and characteristics.