Marasmius oreades the fairy ring mushroom is distributed in lawns all over the northern hemisphere north america eurasia and introduced to new zealand it is a choice edible it is not the easiest mushroom to identify in the beginning being since it is one of the informal and infamous group known as lbms little brown mushrooms marasmius oreades is light brown the umbonate central disc . Of 14 distinctive types of mushroom poisoning found worldwide so far about 10 distinctive patterns of reactions to mycotoxins have been observed in north america however since most mushroom species are rarely eaten many toxins are poorly documented and syndromes not yet observed in north america may turn up as more and more people experiment with eating wild mushrooms nama maintains a . Here is a guide to help you identify over 1500 different mushrooms in the pacific northwest an area that includes all of washington oregon idaho and southwestern british columbia about half of these mushrooms are also widely found across all of north america and in similar climates around the world like europe. Get to know north americas temperate rainforests the pacific northwest is home to the only temperate rainforests on the continent dive into this unique habitat