Roystonea (Royal Palm) is a genus of 10 species of monoecious palms, native to tropical regions of Florida, the Caribbean, and the adjacent coasts of Central and South America. Named for Roy Stone, a U.S. Army engineer, the genus contains some of the most recognizable and commonly cultivated palms (R. regia) in tropical and subtropical regions. Description Roystonea species are single-stemmed trees, average in height to among the world's tallest. Growing from 10-30 m tall, the trunks are white,… (More on Roystonea)