FIGURE 3. Bivariate probability density plot for the variables bracteole length and bracteole width. The isolines are 0.2 in Morphometric characterization of Eryngium viviparum (Umbelliferae): description of a new subspecies from the Iberian Peninsula

FIGURE 3. Bivariate probability density plot for the variables bracteole length and bracteole width. The isolines are 0.2 probability units apart, and those with a thicker line are the 1.0 and 2.0 levels. Note that although the three modes are clearly distinguishable, there is a large overlap between the Galician and French subpopulations.