Ferns belong to the higher spore-producing plants and represent an important evolutionary step between early vascular plants (psilophytes) and seed plants (gymnosperms). Ferns have a well-developed vascular system, which allows them to transport water and nutrients efficiently—unlike mosses, which rely on diffusion. They possess true roots, stems, and leaves, but lack flowers and seeds. Key … Читати далі Division: Ferns (Pterophyta)