Chromosome studies and taxonomic considerations in Acilepidopsis (Vernonieae, Asteraceae)

DEMATTEIS, M.; ROBINSON, H.

Phytologia

Mihael Warnock

Lugar: Huntsville; Año: 1997 vol. 83 p. 366 - 370

Chromosome number and karyotype are reported for the first time in Acilepidopsis echitifolia (Mart. ex DC.) H.Rob. The species presents a somatic chromosome number of 2n=8x=72, with the karyotype composed of 46 metacentric, 16 submetacentric and 10 subtelocentric‑acrocentric chromosomes. At meiosis, A. echitifolia always shows 36 bivalents, interpreted here as an allopolyploid based on x=9. The basic number found in Acilepidopsis supports its generic status and suggests a clear relationship with members of Vernonieae from the Eastern Hemisphere.