Many species are widely planted in the tropics as orchid trees, particularly in India, Sri Lanka, Vietnam and southeastern China. Other common names include mountain ebony and kachnar (India and Pakistan). In the United States of America, the trees grow in Hawaii, coastal California, Texas, Louisiana, and Florida. Bauhinia ×blakeana is the floral emblem of Hong Kong—a stylized orchid tree flower appears on the Hong Kong flag and Hong Kong Airlines uses 'Bauhinia' as its radio callsign in air traffic communication.