Which leaf venation pattern is typical of herbaceous grasses?

Which leaf venation pattern is typical of herbaceous grasses?

• A. Net-like veins
• B. Parallel veins
• C. Scattered veins without pattern
• D. Circular veins

Answer: (B)

Parallel venation is typical of herbaceous grasses. In these leaves, the major veins run side by side from the base toward the tip, with little cross-vein networking. This pattern is a common feature of monocots, the group that includes grasses, and it supports the blade’s elongated shape by allowing efficient transport along its length. In contrast, many broadleaf dicots show net-like (reticulate) venation, where veins form a connected network, which is not characteristic of grasses. Circular veins don’t describe a real venation pattern in leaves. So the best fit for grasses is parallel veins.

Parallel venation is typical of herbaceous grasses. In these leaves, the major veins run side by side from the base toward the tip, with little cross-vein networking. This pattern is a common feature of monocots, the group that includes grasses, and it supports the blade’s elongated shape by allowing efficient transport along its length. In contrast, many broadleaf dicots show net-like (reticulate) venation, where veins form a connected network, which is not characteristic of grasses. Circular veins don’t describe a real venation pattern in leaves. So the best fit for grasses is parallel veins.