Abstract
1) The main results of karyotype analysis in the genus Solanum are summarised as follows:
2) The group so-called night-shade clearly shows an autopolyploid series of the basikaryotype 1L+1L+1M+5M+4S. It is, however, very peculiar that at the reducing division of these polyploid specimens none of the polyvalent chromosomes are found. The facts probably show that an internal change as allopolyploid system occ urred in the genome constitutions.
3) Viewed in point of karyotype aspect, the classification systems of Engler and of Hegi are discussed and the author has concluded that the latter system coincides with our cytological results (cf. Table 1).
