Final answer:
Tall fescue has a hairy ligule, an identifying feature crucial for classifying grass species. Different grasses have varying types of ligules, aiding botanists in species identification.
Step-by-step explanation:
d) Tall fescue, which has a hairy ligule. Ligules are small structures at the juncture where the leaf blade meets the sheath in grass species. In the case of tall fescue, the presence of hairs can help distinguish it from similar grasses that either have smooth ligules or ones that are membranous without hairs.
Kentucky bluegrass and creeping bentgrass both have membranous ligules, while Bermudagrass does not have a true ligule but instead has a fringe of hairs where a ligule would be. Unlike these grasses, tall fescue is known for its hairy ligule, which is an identifying characteristic for students and botanists to note when classifying grass types.
The diversity of features among grasses is an essential part of botany and aids in the proper identification and understanding of plant species within ecosystems.