Noun | 1. | family Ephedraceae - ephedras: in some classifications included in the Gnetaceae gymnosperm family - a family of gymnosperms Gnetales, order Gnetales - chiefly tropical or xerophytic woody plants; practically unknown as fossils but considered close to the ancestral line of angiosperms genus Ephedra - type and sole genus of Ephedraceae: tropical and subtropical evergreen shrubby or creeping plants native to dry and inhospitable regions |