Our grocery store, Natural Grocers, started carrying a big variety of mushrooms, and I've been trying them all. The prices are pretty good. One package is $4-5, and I can get 3-4 servings from them. My sketch is 2 King Trumpet mushrooms. They are a sturdy mushroom and do well with sautéing.
I'm working on showing rounded edges now, which seem to elude me. My art training consists of classes in elementary school, which is where I learned perspective. I don't think I was paying attention about shading, though.