Which category of weeds is described as having narrow, upright leaves with parallel veins and round stems?

• A. Grasses
• B. Broadleaf weeds
• C. Sedges
• D. Forbs

Answer: (A)

Grasses are identified by narrow, upright leaves with parallel veins and round stems. This combination—long, slender leaves with veins running parallel to the leaf length and a round, often hollow stem—is the hallmark of grasses, which are monocots.

Sedges, by contrast, tend to have triangular stems and leaves arranged in a three-rank pattern, and broadleaf weeds (including forbs) have leaves with net-like, branching veins and generally wider leaves. So the description aligns with grasses rather than the other categories. This distinction matters in pest management because herbicides and cultural controls can differ between grass weeds and broadleaf or sedge weeds.