New chromosome numbers for two species from the
Senecio nemorensis group:
S. dacicus (2
n = 40) and
S. ucranicus (2
n = 40) have been ascertained. The counts for
S. germanicus
Wallr. subsp.
germanicus (2
n = 40),
S. hercynicus Herborg subsp.
hercynicus (2
n = 40),
S. ovatus (
P. Gaertn. et al.)
Willd. subsp.
ovatus (2
n = 40) occurring in the Carpathians are also reported. The study confirmed only the known tetraploid chromosome number for
the taxa of this group. The pollen fertility ranged from 82.09 to 92.99% in all examined species and subspecies, including
their hybrids.
Key words karyology -
Senecio
- Asteraceae - stainability - Romania - Slovakia - Ukraine