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Total sugar concentration and total amino acid concentration in wind-pollinated and wind- and insect-pollinated gymnosperms and in floral nectar of representative entomophilous angiosperms: Cucurbita pepo (Cp); Cerinthe major (Cm); and Gentiana lutea(Gl). Ginkgo biloba (Gb) and Ephedra minuta (Em) are plotted separately to highlight their ambophilous-like concentrations.
