Plant genera, their nature and definition - Symposium on "Plant Genera-their Nature and Defination" 1953 : American Society of Plant Taxonomists and Botanical Society of America, Indianapolis).; Lawrence, G. H. M. (George Hill Mathewson), 1910-; Botanical Society of America; American Society of Plant Taxonomists (Gloucester, Mass. : Chronica botanica, 1953)
Keywords: Plants -- Classification