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by Peter H. Raven (Missouri Botanical Garden); Linda R. Berg (St. Petersburg Junior College); George B. Johnson (Washington University)
by Peter H. Raven (Missouri Botanical Garden)
by Peter H. Raven (Missouri Botanical Garden); Linda R. Berg (St. Petersburg Junior College); David M. Hassenzahl
by Trelease, William
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); David M. Hassenzahl (University of Nevada, Las Vegas )
by Shaw, Henry
by Garden, Missouri Botanical