 Especially this spring, like that's when they were mostly coming in, but I still get them from time to time. But little brown mushrooms, this is Paul Stamets' term, describes a tiny lawn-based mushroom that is brown and small. There are thousands of different species, literally thousands. And some of them you could only identify by taking their spores and looking at them under a microscope or doing tissue samples. So if you have a little brown mushroom in your yard,