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CCDB → Angiosperms → Hypericaceae → Hypericum → Hypericum yezoense Maxim.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| Hypericum yezoense Maxim. | Hypericum yezoense Maxim. | 16 | IPCN online | Probatova. 2004. Chromosome numbers of selected vascular plant species from Sakhalin, Moneron and the Kurile Islands. Biodivers. Biogeogr. Kuril Islands Sakhalin 1: 15–23. |