What is a Bracteate Flower?

A bract is a modified or specialized leaf that is associated with a reproductive structure, like a flower or a cone. It is located exactly at the axil (the point where the flower stalk joins the main stem). If a flower has this small, leaf-like structure at its base, it is classified as bracteate (often denoted by 'Br' in floral formulas). If the flower does not have a bract, it is classified as ebracteate (denoted by 'Ebr').

Students often confuse bracts with petals because bracts can sometimes be brightly colored. However:

• Petals are the inner floral leaves designed to attract pollinators directly to the reproductive organs.
• Bracts sit below the entire flower structure. While they are usually small and green (like a tiny leaf), in some plants they evolve to become massive and brightly colored to help attract insects if the actual flower is too small.

The most famous example of a bracteate flower is the Bougainvillea. When you look at a Bougainvillea plant, you see massive, bright pink or purple 'flowers'. However, those pink structures are actually not petals; they are large, colorful bracts. The actual flower of the Bougainvillea is tiny, white, and tubular, hidden right in the center of those bright pink bracts.