Table 1.
Data on chromosome numbers published for Cardamine yezoensis and C. torrentis s.l. (comprising C. valida and C. torrentis s.s.)
| Taxon | 2n | Locality | Author | Original determination | Note |
|---|---|---|---|---|---|
| C. valida | 32 | Japan, Hokkaido, Tokachi, Meto Spa | Kurosawa, 1981 | C. yezoensis | Only C. valida was found at this locality in 2004 |
| C. valida | 32 | Japan, Hokkaido, Tokachi, Yamada Spa | Kurosawa, 1981 | C. yezoensis | Only C. valida was found at this locality in 2004 |
| C. torrentis s.s. | 56 | Japan, Honshu, Gunma, Yamanohana, Oze | Kurosawa, 1981 | C. torrentis | |
| C. valida? | 32 | Russia, Sakhalin, okr. g. Yuzhno-Sakhalinska, gora Chekhova v sisteme Susunaiskogo khrebta, Probatova N. S., Rudyka E. G. 6294, 1982 (VLA) | Rudyka, 1984 | C. yezoensis | Specimen deposited in VLA was revised (incomplete plants only) |
| C. amara s.l. | 16 | Russia, Sakhalin | Sokolovskaya, 1960 | C. yezoensis | Most likely referring to the same locality and the same chromosome count as the next record |
| C. amara s.l. | 16 | Russia, Sakhalin, Anivskii r-n, okr. pos. Novo-Aleksandrovska, na sklone gory Chekhova, Sokolovskaya A. P. 85, 1957 (LEU) | Probatova and Sokolovskaya, 1988 | C. yezoensis | Specimens deposited in LEU and VLA were revised |
| C. yezoensis | 72 | Japan, [Hokkaido], Chiyogaoka, Higashikagura[-cho] | Nishikawa, 1986 | C. yezoensis | |
| C. yezoensis? | 46-48 | plants from Botanical Garden Edinburgh | Manton, 1932 | C. leucantha prol. yezoensis | No voucher specimen was found in herbaria CGE, LDS and MANCH |
No chromosome numbers were previously reported for C. amaraeiformis or C. schinziana. Revision was based either on voucher specimens or populations occurring in the given localities. C. amara s.l. refers to a widely conceived species complex of C. amara, but the exact taxonomic identity of these plants requires further study.