Lactarius is a genus of fungi commonly known as milk caps. These mushrooms are characterized by their ability to exude a milky latex when cut or damaged. They are typically found in forests, often growing in association with trees, and can be identified by their gills, which are attached to the stem. Many species of Lactarius are edible, while others can be toxic. They vary in color, size, and habitat, making them an interesting group for foragers and mycologists. Proper identification is crucial, as some look-alikes can be harmful if consumed.