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stolon: a prostrate or trailing stem that produces
roots at the nodes.
Many grasses grow as compact tufts or tussocks, but others produce runners which grow horizontally and root at each node. This is useful to the plant because if a runner breaks it will continue to grow as an individual plant. If the runners occur above the ground they are termed stolons and they are rhizomes if they occur beneath the ground. The nodes of stolons produce green leaves, while small brown scale-like leaves are produced at the nodes of rhizomes.
