TAXONOMIC SIGNIFICANCE ОF FRUIT MORPHOLOGY AND ANATOMY IN THE BRAZILIAN ENDEMIC GENUS KLOTZSCHIA CHAM. (APIACEAE)

A. I. Konstantinova

Abstract


Morphological and anatomical traits of mature fruits of a Brazilian endemic genus Klotzschia (3 species) are presented. Fruit structure traits shared by the studied species, as well as different ones, are indicated; features previously described incorrectly are corrected (number of ribs, type of secretory ducts). Klotzschia is compared anatomically and carpologically with the representatives of Azorelloideae, the most closely related group. The secretory system of Klotzschia is found to be similar in structure to that of Araliaceae or Hermas (Saniculoideae), while the type and location of lignified tissues in Klotzschia pericarp resemble those of Xanthosia (Mackinlayoideae) species. It is pointed out that carpological traits do not indicate close affinity of Klotzschia with the Australian genus Uldinia. It is demonstrated that some anatomical traits of fruit structure in Klotzschia are apparently related to the way of fruit dispersal. We show that fruit structure traits, if considered together, support the concept of isolated position of Klotzschia in the system of Apiales, based on the data of molecular phylogenetics. Our results rather support the pattern of Klotzschia being a lineage diverging from the phylogenetic tree after Azorelloideae than its placement as sister to this subfamily.


Keywords


Apiaceae, Klotzschia, Azorelloideae, carpology, fruit morphology and anatomy, pericarp, vascular system, secretory system, trichomes

References


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