FIGURE 1.

Differentiation of nectar and pollen chemical composition in relation to plant origin (Cultivated vs. Wild). Information on the quantitative concentration of compounds was used to construct PCA ordinations for absolute composition (A,B), whereas relative concentrations of compounds (their percent contribution relative to other compounds in the sample) was used to construct NMDS ordinations for proportional composition (C). Outlying data points in (A) are cultivar ‘Spartan’ (four rightmost points) and ‘Northland’; and in (B) are cultivar ‘Pioneer.’