Tibouchina is a genus of flowering plants in the family Melastomataceae. It consists of approximately 350 species of evergreen shrubs and small trees native to tropical and subtropical regions of the Americas, particularly South America. Some species are also found in parts of the Caribbean and the Pacific Islands.

Tibouchina plants are known for their vibrant and showy flowers, which come in various colors including purple, pink, and white. The flowers are typically large and have a distinct shape with five petals. The foliage of Tibouchina plants is often dark green and glossy, providing an attractive backdrop to the colorful blooms.

These plants are popular in gardens and landscaping due to their striking flowers and foliage. They can be grown both as shrubs and small trees, depending on the species and variety. Tibouchina plants prefer warm climates and are typically not frost-tolerant, although some species can tolerate cooler temperatures to a certain extent.

In terms of care, Tibouchina plants require well-draining soil and regular watering to keep the soil moist but not waterlogged. They also benefit from regular fertilization during the growing season to promote healthy growth and abundant flowering. Pruning can be done to maintain a desired shape and size, typically in late winter or early spring.

It's worth noting that there are several popular species and cultivars within the Tibouchina genus. One well-known species is Tibouchina urvilleana, commonly referred to as "Princess Flower" or "Glory Bush," which is appreciated for its large purple flowers. Another popular species is Tibouchina granulosa, known as "Purple Glory Tree," which can grow into a small tree and has beautiful purple flowers as well.