stolon

/ˈstoʊlɑn/
noun
  1. A horizontal stem or runner that grows along the ground and produces new plants at its nodes, as in strawberries or mint.
    • Each stolon can root and form a new plantlet at its tip.
    • The strawberry plant spreads by sending out stolons across the soil.
    • Gardeners often cut the stolons to control the growth of mint.