Which warm-season perennial grass has wiry fine stems that root at the nodes and forms circular patches?

• A. Nimblewill
• B. Nutsedge, Yellow
• C. Plantain, Buckhorn
• D. Purslane, Common

Answer: (A)

The key idea is recognizing how the plant spreads. Nimblewill is a warm-season perennial grass that creeps by wiry, fine stolons that root at the nodes. This growth habit creates distinct circular, ring-like patches in the turf. That ring-forming, stolon-rooting behavior is what sets nimblewill apart from the others. Nutsedge is a sedge with triangular stems and tends to form irregular clumps rather than circular rings. Plantain buckhorn and purslane are broadleaf weeds, not grasses, so they don’t exhibit this stolon-based, ring-forming growth. So the description fits nimblewill best.