Psilocybe cubensis is on the larger side as far as magic mushrooms go. It’s also one of the most common. Called the common large Psilocybe, golden cap or Mexican mushroom, it has many different types. The cap is usually reddish brown, with a white or yellowish stem. When bruised or crushed, its sticky flesh often turns bluish. Some people consider this a definitive sign of finding a magic mushroom, but some toxic types of mushrooms bruise as well. It’s usually found in moist, humid climates and grows on the dung of grazing animals like cattle.