Eastern red columbine (Aquilegia canadensis)
The American Woodland Garden,
Rick Darke. 2002. Timber Press, Portland, OR.
Armitage’s Native Plants for North American Gardens,
Allan Armitage. 2006. Timber Press, Portland, OR.
Collecting, Processing, and Germinating Seeds of Wildland Plants,
James and Cheryl Young. 1986. Timber Press, Portland, OR.
The Encyclopedia of Grasses for Livable Landscapes,
Rick Darke. 2007. Timber Press, Portland, OR.
A Gardener’s Encyclopedia of Wildflowers,
Colston Burrell. 1997. Rodale Press, Emmaus, PA.
Gardening with Native Plants of the South,
Sally Wasowski. 1994. Taylor Trade Publishing, Lanham, MD.
Gardening with Native Wild Flowers,
Samuel B. Jones & Leonard E. Foote. 1990. Timber Press, Portland, OR.
Growing and Propagating Showy Native Woody Plants,
Richard Bir. 1992. University of North Carolina Press, Chapel Hill.
Growing and Propagating Wild Flowers,
Harry Phillips. 1985. University of North Carolina Press, Chapel Hill.
Hartmann and Kester’s Plant Propagation: Principles & Practices,
Hudson Hart-mann, Robert Geneve, Dale Kester, Fred Davies. 2001. Prentice Hall, Englewood Cliffs, NJ.
Herbaceous Perennial Plants,
Allan Armitage. 1997. Stipes Publishing, Champaign, IL.
Invasive Plants: Weeds of the Global Garden,
John Randall and Janet Marinelli, eds. 1996. Brooklyn Botanic Garden, Brooklyn, NY.
The Living Landscape: Designing for Beauty and Biodiversity in the Home Garden,
Rick Darke and Doug Tallamy. 2014. Timber Press, Portland, OR.
Manual of Herbaceous Ornamental Plants,
Steven M. Still. 1994. Stipes Publishing, Champaign, IL.
Manual of Woody Landscape Plants,
Michael A. Dirr. 1998. Stipes Publishing, Champaign, IL.
Native Perennials: North American Beauties,
Nancy Beaubaire, ed. 1996. Brooklyn Botanic Garden, Brooklyn, NY
Native Plants of the Southeast: A Comprehensive Guide to the Best 460 Species for the Garden,
Larry Mellichamp. 2014. Timber Press, Portland, OR.
Native Trees, Shrubs, and Vines,
William Cullina. 2002. Houghton Mifflin, Boston.
The New England Wildflower Society Guide to Growing & Propagating Wildflowers of the US & Canada,
William Cullina. 2000. Houghton Mifflin Company, Boston.
Perennial Combinations,
Colston Burrell. 1999. Rodale Press, Emmaus, PA.
The Reference Manual of Woody Plant Propagation,
Michael A. Dirr and Charles W. Heuser Jr. 1987. Varsity Press, Athens, GA.
Seed Germination Theory and Practice,
Norman C. Deno. 1993. Self-published: 139 Lenor Dr., State College, PA.
Seeds of Woody Plants in North America,
James and Cheryl Young. 1992. Dioscorides Press, Portland, OR.
Wyman’s Gardening Encyclopedia,
Donald Wyman. 1986. MacMillan Publishing, New York.