There are pictures, et'. For instance, when I looked up Quercus palustris, two photographs came up: one of its bark and the other of many views of acorns. But I wish there were more pictures of leaves, acorns, stem tips, etc. There is a hodgepodge of photographs, but not an extensive collection for each species. However, just knowing I can look up the Latin botanical names for trees and find quick definitions is a step in the right direction.