The Subclass Arecidae is a group of plants commonly known as palms. Palms are tropical and subtropical plants that vary from small bushy shrubs to tall trees. They are distinguished by their large, compound leaves and unique branchless stems. Palms are grown for their beauty, architectural interest, and unique foliage and fruit. The Arecidae subclass is further divided into several families, including the Arecaceae, which is the largest and most diverse family. Synonyms for the Subclass Arecidae include palm family, Palmae, and Arecales. Whatever the name, palms form a striking and important component of tropical and subtropical landscapes across the world.