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71Flora of North America Editorial Committee, eds. 1993+. Flora of North America North of Mexico. 7+ vols. New York and Oxford.
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67Miles, Bebe, 1976. Wildflower Perennials for Your Garden. Hawthror Books New York
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56Schneider, Anny 2002. Wild Medicinal Plants. Stackpole Books. Mechanicsburg Pa.
49Smith, Richard M. 1998. Wildflowers of the Southern Mountains. Univ. Tennessee Press, Knoxville
48Sperka, Marie 1973. Growing Wildflowers: A Gardener’s Guide. 1973 Harper and Row.
61Steffek, Edwin 1983 The New Wild Flowers and How to Grow Them Timber Press Portland
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63Taylor, Kathryn, and Stephen Hamblin. 1963 Handbook of Wildflower Cultivation. MacMillan Company. New York.
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