Números cromosómicos y cariotipos de algunas especies de Vernonia (Asteraceae)

DEMATTEIS, M.

BOLETíN DE LA SOCIEDAD ARGENTINA DE BOTáNICA

Sociedad Argentina de Botánica

Lugar: Buenos Aires; Año: 1997 vol. 33 p. 85 - 90

0373-580X

Chromosome numbers and karyotypes of some species of Vernonia (Asteraceae). Meiotic or mitotic chromosome numbers were determined in 12 species of Vernonia. The numbers include first counts for five species: V. incana (2n=34), V. brevifolia (2n=32 + 1-3B), V. sellowii (2n=62), V. squarrosa (2n=64) and V. oxyodonta (2n=128). The karyotype of five species are also analyzed, three of these are described for the first time: V. nitidula 2n=34= 22m + 12sm, V. brevifolia 2n=32= 22m + 10sm and V. mollissima 2n=64= 44m + 20sm. The significance of the results is discussed in relation to the taxonomic position of these species.