Gnetophyta is a group of seed-producing plants that includes three main genera: Gnetum, Ephedra, and Welwitschia. These plants are unique because they share characteristics with both angiosperms (flowering plants) and gymnosperms (non-flowering seed plants). They are primarily found in tropical and arid regions. Gnetophytes are known for their diverse forms, ranging from climbing vines to large, desert-dwelling plants. They have distinct reproductive structures, with some species producing cones and others having more flower-like features. This diversity makes them an interesting subject of study in plant evolution and ecology.