Which statement accurately defines stolons in turf establishment?

• A. Underground roots
• B. Above-ground leaves
• C. Above-ground vertical stems
• D. Above-ground horizontal stems that send shoots at nodes

Answer: (D)

Stolons are above-ground horizontal stems that spread along the soil surface and produce new shoots at each node. This allows the turf to rapidly cover open areas because every node can give rise to a new plant, extending the colony outward from the parent along the surface. The definition matches the distinctive growth habit: a horizontal stem that stays above ground and repeatedly sends out shoots at nodes. It’s different from underground structures like roots or rhizomes (which are below ground). Roots aren’t stems, and vertical above-ground stems aren’t stolons; they’re upright, not spreading along the surface. This above-ground, horizontal, node-spreading behavior is what sets stolons apart and enables quick turf establishment.