Which of the following does not distinguish turfgrasses from other plants?

• A. Can fix atmospheric nitrogen
• B. Have stolons
• C. Form dense turf
• D. Reproduce through rhizomes

Answer: (A)

Turfgrasses are identified by their growth form and how they spread to form a continuous lawn. They typically form dense turf and spread vegetatively to cover ground, using structures like stolons (above-ground runners) and rhizomes (underground stems) to rapidly fill in space. These traits—dense turf and spreading via stolons or rhizomes—are characteristic ways turfgrasses establish themselves and maintain a uniform appearance. Nitrogen fixation, the ability to convert atmospheric nitrogen into a usable form, is not something turfgrasses do; it’s a capability more associated with legumes and certain microbes. Because many turfgrasses do not fix nitrogen, this trait does not distinguish them from other plants, while the presence of stolons, rhizomes, and the resulting dense turf do.