Investigations on the Karyotype of 40 Chromosome Dwarf Bearded Irises (Third Contribution)

SUMMARYThe study of 40 chromosome dwarf bearded Irises, reported in previous papers, has now been extended to the localities of Monte Marcello, Pozzuolo, San Giuliano Terme, Gabbro, Braccagni, Alberese, La Marsiliana along the banks of the river Albegna and La Marsiliana-Pietricci. A common karyotype, showing slight differences, according to the clones examined and generally referring to the satellites, has been evidenced by means of karyological investigation. In addition to this a brief morphological analysis of the specimens has been carried out at flowering in the Hortum Botanicum Florentinum. The data recorded in Table I show that it is impossible to distinguish different entities in the group of the Irises studied, through karyological analysis. This seems to be confirmed by the few morphological data. More detailed morphological analysis and possibly an investigation on the behaviour of the hybrids, would seem at the moment to be the only way to solve this problem

Karyological Observations on Two Crocus

SUMMARYKaryotypical analysis of Crocus vernus (L.) Hill subsp. vernus (2n = 16 + 2B) and of Crocus etruscus Pari. (2n = 8) is reported. B-chromosomes in Crocus vernus (L.) Hill subsp. vemus are found for the first time. The karyological comparative analysis points out a true micromorphic differentiation between the two species considered