Interesting succulent features in thePinguicula species from the Mexican evolutionary centre

This paper deals with the carnivorous plants of the genusPinguicula occurring particularly in wet habitats. Nevertheless, some species are able to survive longer dry periods in the course of which they form succulent rosettes. Leaf anatomy has been investigated in 6 Mexican species of this kind. The following features frequent in typical succulents have been found: green sheats of vascular bundles (indicating the C₄-pathway of CO₂ assimilation in photosynthesis) and the chlorenchyma located in the lower (= abaxial) part of the mesophyll, under a layer of translucent water-storage tissue. These features are discussed with regard to phylogenetical relationship within the genusPinguicula.