The ways in which the Maya people of Yucatan, Mexico use the plants surrounding them has been a subject of interest to outsiders for at least several hundred years. Existing information on the subject is quite different from that of Central Mexico, especially in that plant illustrations from the colonial period are almost non-existent. Illustrations for the flora of Yucatan are still scarce. This thesis is the result of two research trips to Yucatan. My goal was to illustrate as many plants as possible, collect information on their uses along with voucher specimens, and present the information in a reference book format. The specimens were identified by Tulane Herbarium Assistant Curator Anne S. Bradburn. I compare my collection to those of Ralph Roys and Morris Steggerda