ibclogo XVI International Botanical Congess


Abstract Number: 5388
Poster No. = 518


SYSTEMATIC AND PHYLOGENETIC SIGNIFICANCE OF SEED CHARACTERS IN DRYMARIA (CARYOPHYLLACEAE)


Manuel Escamilla and Victoria Sosa, Instituto de Ecología, Xalapa, Veracruz, México


A cladistic analysis with all 50 species of Drymaria and 55 characters was conducted to examine relationships among species within the genus, to test monophyly of groups of species included in 17 infrageneric series and to resolve if monophyly is supported by seed characters. Seeds have previously been used in the classification of Caryophyllaceae and their variation provide a number of characters. Seeds of 17 species representative of the series were observed with SEM. A strict consensus of all most parsimonious trees suggests that Drymaria is not monopyletic. Out of the 17 infrageneric series, species in Series Holosteoides, Lyropetala and Excisae formed monophyletic groups. The rest of the species in the series were distributed among different clades. Among seed characters, hilum position and seed testa surface were significant.


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