This practice of plant taxonomy is to provide the students with the ability to identify the vascular plants by the herbarium of PPI and in the fields. The content includes collecting plants in the fields and specimens made, using the key to the families to identify the unknown plants in the family level, describing the morphology of parts of plants by the terminology, examining the specimens of herbarium and slides to improve the ability of identification, visiting another herbarium of Taiwan to introduce the function and value to the study of taxonomy.