When that grilled portobello appetizer no longer satisfies your 'shroomistic cravings, call in the experts at the MSSF. Founded in 1950, it's the largest amateur mycological association in North America. Members go on field trips in search of feral fungi, prepare monthly meals heavy on the wild mushrooms, attend study groups and cultivation classes, and in general indulge their passion for the marvelous mushroom at every opportunity. Fungus Fairs have been held once or twice a year since 1971, and the society's extensive library includes Louise and William Freedman's Wild About Mushrooms: The Cookbook of the Mycological Society of San Francisco, featuring recipes for chanterelle puffs, jellied blewit soup, pickled matsutakes, and morel bisque. Membership is $25 ($20 for students and seniors) and includes a subscription to the society newsletter, Mycena News. Meetings are held every third Tuesday from September through May at the Randall Museum; for more information visit www.mssf.org.