This study aims to examine the comparative structure of the trachea in five plant species of the Myrtaceae family, namely Jambu bol (Syzygium malaccense), Karamunting (Rhodomyrtus tomentosa), Jambu air (Syzygium aqueum), Pucuk merah (Syzygium oleana), and Salam (Syzygium polyanthum), and to test the validity of a booklet as a biology enrichment material for senior high school. The research meth…