Flowering plants grow flowers and use seeds to reproduce, or make more plants like them. Nonflowering plants do not grow flowers, and use either seeds or spores, which are very tiny parts of a plant that can be used to reproduce, to grow more plants just like them.
Earlier research had shown that plants' leaves perceived seasonal changes in day length, which triggers a long-distance signal to travel through the plant's vascular system from the leaf to the shoot apex , where flowering is induced.
angiosperm , also called flowering plant, any of about 300,000 species of flowering plants, the largest and most diverse group within the kingdom Plantae. Angiosperms represent approximately 80 percent of all the known green plants now living.