Tibouchina are tropical shrubs and trees with beautiful, showy purple flowers that bloom over a long period. Plants kept as shrubs tend to become leggy and sprawling. They need frequent tip pinching and a major trimming in Spring to keep bushy. Prefers sun.
The naming conventions for Tibouchina used in gardening books and on the Web can be confusing. While Tibouchina urvilleana is consistently named as "Princess Flower", the same name is also applied to Tibouchina semidecandra. Then you have various permutations of "Glory" applied to plants in this genus. See the Overview link below to Dave's Garden for a good representation of the plants in the Tibouchina genus.