Plant Clades & Classes is a subcategory used to organize plants through higher shared layers of evolutionary traits. Plant clades are groups of plants that share a common ancestor and are considered to be closely related based on their evolutionary history. Clades are typically identified based on shared physical and biological characteristics and are used to understand the relationships between different plant groups. Plant classes are a higher level of classification that include multiple clades. These classifications are used to organize and understand the diversity of plant life.