Which of the following is NOT a typical characteristic of grasses?

Grasses are known for several key characteristics that distinguish them from other types of plants. One of the most defining features is their narrow leaves, which typically have a parallel vein structure. This is a crucial adaptation for their growth in various ecosystems, allowing efficient photosynthesis and water retention.

Inconspicuous flowers arranged in spikelets is another typical characteristic of grasses. These flowering structures are designed for wind pollination, which is quite common in grass species. Additionally, grasses often have fibrous root systems that provide stability and help in the quick uptake of water and nutrients from the soil.

While broad leaf structures are common in many plant families, they are not a typical characteristic of grasses, which tend to have narrow leaves. This distinction is important in identifying grass species and understanding their ecological roles. Therefore, the correct answer highlights that broad leaf structures do not fit with the typical features of grasses.