[en] Begonias: Cultivation, Identification, and Natural History

[en] Hardy Rhododendron Species: A Guide to Identification

[en] Herbaceous Perennial Plants: A Treatise on Their Identification, Culture, and Garden Attributes

[en] The Shrub Identification Book: The Visual Method for the Practical Identification of Shrubs

[en] Tree Identification

[en] Tropical Flowering Plants: A Guide to Identification and Cultivation