A stem tuber forms from thickened rhizomes or stolons. The plants usually have underground rhizomes or tubers. The flowered shoot continues to grow by producing plantlets via its rhizomes or stolons. It is a perennial grass with rhizomes or stolons. It is a group of herbaceous perennials with rhizomes or corms. The plant is reproduced by seeds, creeping rhizomes, and tubers. The plant is difficult to control due to its extensive rhizomes and deeply buried tubers. Coltsfoot is a perennial herbaceous plant that spreads by seeds and rhizomes. The some grasses are rhizomatous and some lack rhizomes, and rarely species are stoloniferous. It is a herbaceous perennial growing from short, thick rhizomes. Ferns mostly produce large diploid sporophytes with rhizomes, roots and leaves. "Solidago" species are perennials growing from woody caudices or rhizomes. The plants often form in clumps by branching of the underground rhizomes. The vines develop adventitious roots, or the plant can spread from rhizomes or root crowns. Short stems grow up from extensive, white branching rhizomes.