Lycopodium is a genus of clubmosses, which are ancient vascular plants that belong to the family Lycopodiaceae. These plants are characterized by their small, scale-like leaves and spore-producing structures called strobili. They typically grow in moist, shaded environments, such as forests, and can be found in various regions around the world. Lycopodium species reproduce through spores rather than seeds, making them different from most modern plants. The spores are often used in traditional medicine and as a flash powder in photography due to their flammable properties. These plants play a role in their ecosystems by contributing to soil stability and providing habitat for small organisms.