What are the differences between non vascular plants, seedless vascular plants and seed plants?
Non-vascular plants are plants that have no vascular tissue (vessels–xylem and phloem). These include Bryophytes (mosses) and Algae. Seedless vascular plants are plants that have vascular tissue but don’t produce seeds. These include Club mosses, Spike Mosses, Quillworts (Lycophyta), Horsetails, Whisk Ferns, Ferns (Pterophyta). Seed plants are all the rest, and have both vessels and produce seeds.