The common name for Begonia rex is rex begonia or painted-leaf begonia.
Begonia rex, also known as rex begonia or painted-leaf begonia, is a popular species of begonia cultivated for its colorful foliage. It is native to parts of India and is grown as an ornamental houseplant in many parts of the world. Begonia rex leaves come in a variety of colors, including green, pink, red, and silver, often with intricate patterns and textures. They prefer bright, indirect light, moderate humidity, and well-draining soil. Rex begonias are often grown for their foliage and are prized for their ornamental value.