Final answer:
Centipedegrass and St. Augustinegrass are stoloniferous grasses, which means they produce horizontal above-ground branches called stolons. These stolons allow the grasses to spread and produce new shoots or tillers. They also contribute to the plants' reproduction and mobility.
Step-by-step explanation:
Centipedegrass and St. Augustinegrass are both examples of stoloniferous grasses. Stolons are horizontal above-ground branches that allow grasses to spread and produce new shoots or tillers. They play a role in reproduction and mobility of the grass plants. For example, stolons can produce adventitious roots and buds that grow into new plants at nodes. In summary, Centipedegrass is stoloniferous, while St. Augustinegrass is primarily stoloniferous but can also produce rhizomes.