What is the name of the appendages located at the base of leaf blades?

The term "auricle" refers specifically to the appendages that are found at the base of the leaf blades in certain grass species. These structures can vary in size and shape but typically serve to help protect the junction between the leaf blade and the stem as well as contribute to the plant's overall morphology by potentially aiding in water retention and reducing herbivory. In many grasses, auricles may take on a wing-like appearance and may be either membranous or hairy, depending on the species.

In contrast, other terms like "ligule" refer to a different part—the thin membrane or fringe of tissue that occurs where the leaf blade joins the stem, which is crucial for identifying grass species. "Stolon" denotes a horizontal stem that grows along the ground, typically used by the plant for vegetative reproduction, while "floret" is a term used to describe a small flower within the inflorescence of flowering plants. Each of these structures has its unique role in plant biology and ecology, but when it comes to identifying the specific appendages at the base of leaf blades, "auricle" is the most accurate choice.