Book excerpt: In the last two decades, plant biology has developed rapidly, ranging from molecular genetics, cell biology, and physiology to ecology and evolutionary issues, both for economic species and species unrelated to humans. These topics have received intensive attention, however, there is still a large gap in the study of plant biology in prehistoric times, especially those closely related to humans. The identification of plant species in archaeological sites plays an important role in exploring the paleoenvironment, the origin and spread of agriculture, and the relationship between humans and nature. In this research topic, we welcome progress in all aspects of ancient plant fossil research, especially phytoliths, starches, pollen and carbonized seeds, from the mechanisms of plant fossil formation to their phytosystematics, and the associated paleoecology and paleoenvironment.