Meiotic behavior of Senecio sect. Senecio taxa. A: S. melanopotamicus, diakinesis with 20 II, arrow indicate chromosome breakage. B: S. goldsackii, metaphase I, 1 II and 2 I out of plate. C: S. melanopotamicus, telophase I, a chromosome not included in a pole. D: S. microphyllus, prophase II with A and B (arrows) chromosomes not included in cell poles. E: S. goldsackii, telophase II with a bridge. F-G: S. subulatus var. erectus, F: microsporocyte with one big micronucleus (A chromosome); G: microsporocyte with one small micronucleus (arrow, B chromosome). H: S. ganganensis, telophase II with micronuclei. I: S. eruciformis var. brachycephalus, tetrads with one micronucleus. Bars = 10 μm.