Figure 4 from: Pereira JBS, Giulietti AM, Pott VJ, Watanabe MTC (2019) Rediscovering two Isoetes species in the Brazilian Amazon and Cerrado after 167 years. PhytoKeys 135: 105-117. https://doi.org/10.3897/phytokeys.135.46624

Figure 4 Boxplots showing quantitatively the variation in the size of the macro-ornamentation projections of the megaspores of I. gardneriana and I. panamensissensu lato. In the proximal surface, the projects of the macro-ornamentation are narrower and shorter in I. gardneriana than in I. panamensiss.l. In the distal surface, the macro-ornamentation projections are slightly narrower and considerably shorter in I. gardneriana than in I. panamensis s.l..