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by Peter H. Raven (Missouri Botanical Garden); Linda R. Berg (St. Petersburg Junior College); David M. Hassenzahl (Chatham University)
by Peter H. Raven (Missouri Botanical Garden); Linda R. Berg (St. Petersburg Junior College); George B. Johnson (Washington University)
by Thomas Lancraft (St. Petersburg Jr. College ); Frances Frierson (Valencia Community College ); Eric Sun (Macon State College ); et al.
by Linda R. Berg (formerly of St. Petersburg Junior College ); Mary Catherine Hager
by Peter H. Raven (Missouri Botanical Garden); Linda R. Berg (St. Petersburg Junior College); David M. Hassenzahl
by Linda R. Berg (formerly of St. Petersburg Junior CollegeĀ ); Mary Catherine Hager
by Linda R. Berg (Former affiliations: University of Maryland, College Park; St. Petersburg College); Mary Catherine Hager
by Linda R. Berg (Former affiliations: University of Maryland, College Park; St. Petersburg College); David M. Hassenzahl (Chatham University); et al.
by Peter H. Raven (Missouri Botanical Garden); Linda R. Berg (St. Petersburg Junior College); David M. Hassenzahl (University of Nevada, Las Vegas )
by Linda R. Berg (St. Petersburg Junior College); Mary Catherine Hager; David M. Hassenzahl (University of Nevada, Las Vegas)