A runner is very similar to a stolon . Both structures allow the plant to move within its environment. The term thorn is a synonym. A prickle is similar, but is produced from the epidermis of the stem, leaf, or root. Opuntia and other cacti have spines.
Stolons are similar to runners .
Modified stems or leaves that grasp other plants and act like grappling hooks. Tendrils and hooks, which are found on vines, assist the vine in supporting itself. The Virginia creeper is unusual because it has small pads at the ends of its tendrils. These pads attach themselves to walls and tree trunks instead of twining around the trunk. An underground, swollen stem.