1. Finding similar species and defining them carefully. 2. Analyzing different species by using the knowledge I learn in field botany course, which including the crucial and simplified details of two similar plants. 3. Collecting the typical leaves, barks, twigs of the species, and makes them into sample. 4. Draw the species on several piece of paper to express the identifiable characteristic of the plants clearly. 5. Make the handbook as the following pictures shows.