Is bougainvillea a trimerous flower

Bougainvillea flowers are considered trimerous because they typically have three main parts: three sepals and three petals. However, the colorful parts that are often mistaken for petals are actually modified bracts. The actual flowers are small and tubular, located within these bracts. Thus, while they exhibit a trimerous structure in their floral arrangement, the bracts play a significant role in their appearance.