There are three general ways to present data and these are:
[1] Textual Method
[2] Tabular Method
[3] Graphical Method
Since Dr. Peterson has to present the medicinal properties of some plants, analytical values are not available, only accounts and qualitative results. The Graphical Method would not apply. Therefore, the most logical way for Dr Peterson to present his research is through Tabular Method. He can make a table listing down all the plants each with a description of their medicinal properties.