Dirr's encyclopedia of trees and shrubs.

Portland OR: Timber Press, 2011.
Quarto, laminated boards, 951 pp. colour photographs.

The text reflects the passions of the author and gives full details of the plants, from the latest nomenclatural changes to revisionist thinking on the ever-expanding limits of cold hardiness. Mike Dirr is a legend in the horticultural world, widely acknowledged as a leading expert on trees and shrubs for landscapes. Add to that more than 3500 colour photographs, and indispensable back matter lists for choosing exactly the right plant for the right purpose, and you have an unsurpassed resource for tree and shrub identification and selection, one that will be embraced by garden designers, landscape architects, urban foresters, park managers, nursery professionals and anyone who values hardiness, disease resistance, and beauty in their woody plants.