What do you call the part of the grass inflorescence that consists of a pair of bracts at the base?

The term for the part of the grass inflorescence that consists of a pair of bracts at the base is known as a glume. Glumes serve to protect the developing flower and seed within the spikelet and help in holding and supporting the structure of the inflorescence. They typically come in pairs, one on each side of the spikelet, and their presence is characteristic of grasses and certain types of flowering plants known as Poaceae.

Understanding the function of glumes is important in plant morphology, as they play a significant role in the reproductive success of grasses. They help shield the delicate floral parts from environmental factors, improving the chances of pollination and seed formation.

In contrast, auricles are small extensions or appendages at the junction of the leaf blade and leaf sheath; spikelets are the complete units containing the flowers and glumes; and stolons are horizontal stems that grow along the ground, allowing for vegetative reproduction. Each of these terms describes different structures within grass plants, underscoring the unique functions and characteristics that distinguish them.