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Methods of Propagation In angiosperms the seed represents the result of the sexual union of sperm and egg. From the seed, new plants will propagate, or make more plants. However, there are several ways in which plants can reproduce more of their kind asexually. When new plants are reproduced from vegetative parts such as roots, stems, or leaves, this is called vegetative propagation. Vegetative propagation occurs naturally and artificially. Natural ways include bulbs (short underground stems with thick fleshy or scaly leaves in circular layers), tubers (enlarged or swollen sections of an underground stem with stored food), runners (horizontal stems with buds), corms (thick fleshy underground stems encased in thin scaly leaves), and rhizomes (horizontal underground stems). Bulbs. Tubers. Runners. Corms. Rhizomes.