Carruthers,Peter. “From Grey to Print Preliminary Excavations at Ste.Marie II.” Ontario Archaeology no.94 (2014) : 125
Archaeologists can determine through the type of root that is found the type of tree that would have been on site. For example if the root is Beech, then we know that beech nuts were likely to be included in the diet of the people living in the area.
When archaeologists find multiple types of flora, we can start to understand what the past environment of the area looked like including the types of resources that may have been available.