The first is a field guide using vegetative key and the second is using really good drawings and is really comprehensive. For trees and shrubs there is this one: https://www.abebooks.de/9780881925203/Illustrated-Encyclopedia-Trees-David-White-0881925209/plp
Sk Imran Sk, I suggest looking for guides specific to your local climate. These can be found at a library. Or by using the internet connection of your own computer. That search tool will tend to be specific to your general location and climate. The sources below tend to be for the land and climate of north america. In my experience the Peterson collection of guides (see #2) offer a large variety of plants, trees, vegetables grasses and flowers. However these too are made for plant life in specific climate. The following are my best ideas ---but--- for lands in North America.
1)__ Photographic Atlas of Botany & Guide to Plant Identification Spiral-bound – January 1, 2005
by James L. Castner
2)__ A Field Guide to Trees and Shrubs (Peterson Field Guides) Paperback – January 1, 1973