Field Guide to Cacti & Other Succulents of Arizona, Second edition
Breslin, Peter, Rob Romero, Greg Starr, & Vonn Watkins
The Wild Flowers of Britain and Northern Europe
Natural History of New York Part 5, Volumes I-III
Emmons, Ebenezer, MD
Mosses And Liverworts. New Naturalist No. 97
Porley, Ron; Hodgetts, Nick
Growing and Propagating Showy Native Woody Plants
Bir, Richard E.
Flora of the Barro Colorado Island
Croat, Thomas B.
The New Neotropical Companion
Common Weeds of the United States
Agricultural Research Service USDA
The Wild Flowers of Britain and Northern Europe [Third Edition]
Fitter, Richard; Fitter, Alastair
Flora of Richmond and Vicinity (Exclusive of Grasses, Sedges and Trees)
Merriman, Paul R.
The Long, Long Life of Trees
Principles of Fruit-Growing: With Applications to Practice
Bailey, L. H.