Selaginellaceae is a family of plants commonly known as spike mosses. They are non-flowering vascular plants that belong to the division Lycopodiophyta. These plants are characterized by their small, scale-like leaves and a creeping or upright growth habit. They thrive in a variety of habitats, often in moist, shaded areas. Members of the Selaginellaceae family reproduce via spores rather than seeds. They have a unique life cycle that includes both a dominant sporophyte generation and a smaller, independent gametophyte generation. This family is important for understanding plant evolution and ecology, as they are among the oldest lineages of vascular plants.