The Family Rhyniaceae is a group of extinct vascular plants that existed during the Early Devonian period. While there are no direct synonyms for this specific family, it is part of a larger group of early land plants known as the Rhyniophytes. Other families within the Rhyniophytes include Aglaophytonaceae, Asteroxylaceae, and Rhyniaceae. These plants are important in understanding the evolution of land plants and their adaptation to terrestrial environments. The Rhyniaceae family in particular is known for its rootless and dichotomously branching form, as well as its reproductive structures which include spores and sporangia.