A stem tuber forms from thickened rhizomes or stolons. The perennial form spreads with stolons or rhizomes. The flowered shoot continues to grow by producing plantlets via its rhizomes or stolons. Propagation is by rhizomes, stolons, or seeds. It is a perennial grass with rhizomes or stolons. This grass is low-growing and creeping with stolons and stout, scaly rhizomes. Buffalograss sends out numerous, branching stolons; occasionally, it also produces rhizomes. Plants often form dense clumps from a spreading rhizome or stolons. It has no stolons or rhizomes, and no auricles. Polyps further multiply by growing additional stolons, branches and then polyps, to form colonial hydroids. It spreads by aboveground stolons, commonly known as "runners", and forms a dense layer. Some bryozoans form colonies through connection of individual units by stolons. They have wide-spreading underground and overground stolons and erect, square, branched stems. The shoot also produces stolons that are long etiolated stems. Flowering plants often produce no stolons.