FIGURE 4 in The Isoetes longissima complex (Isoetaceae) in Italy: observations on the morphology of spores and leaves, and taxonomic implications

FIGURE 4. Graphic showing the morphological relationships (based on the number of leaves per plant) among the taxa here examined. The presence of a continuous line between two taxa evidences no statistically significant difference (Tukey HSD test, p> 0.39); the presence of a discontinuous line between I. sicula and I. tiguliana evidences a still not significant difference but with a lower p (0.11).