The reason I like the Audubon field guide is 1. it's compact to carry and 2. it has hundreds of color photos, sorted by leaf structure, leaf type, fruit type, fall color, flower color. And the species are listed with common name. I use it a lot.The front contains basic scientific information about plants. Leaf structure and how it is defined, reproduction, flower structure, etc. The body of the book is species of plants and cultivars. There are not any color pictures or photographs. Merely line drawing for individual leaves and flowers. It is arranged in alphabetical order based on Latin name. There is cross reference in the back that has common names.