Which weed forms a dense rosette of leaves and has narrow leaves that often twist or curl?

• A. Narrowleaf plantain
• B. Common yarrow
• C. Henbit
• D. Wood sorrel

Answer: (A)

This weed is best identified by its growth form and leaf shape. Narrowleaf plantain forms a dense basal rosette, meaning a compact cluster of leaves sits low at the soil surface. The leaves themselves are long and narrow (lance-shaped) with a strong central vein, and they often twist or curl along their length, giving a twisted look when the plant is stressed or growing in dry conditions. This combination of a tight rosette and narrow, twisting leaves distinguishes it from the others.

Common yarrow has highly dissected, feathery leaves on upright stems, not a dense basal rosette of narrow blades. Henbit has rounded, scalloped leaves on sprawling, square stems and forms a low mat rather than a tight rosette of narrow leaves. Wood sorrel displays trifoliate, heart-shaped leaflets that resemble a clover, not long, narrow leaves arranged in a rosette. Therefore, the described weed matches narrowleaf plantain.