| Stuckeniabottnica (Hagstr.) Holub | |
| Publ. & Syn. | Potamogeton pectinatus x P. vaginatus. - Stuckenia pectinata x S. vaginata. |
| Notes | We provisionally include the probably sterile hybrid Stuckenia x bottnica as it occurs well outside the range of at least one of its parents (S. vaginata). The independence may either be due to efficient bird dispersal of shoot fragments or it may have a historical background. The hybrid is present in a large gap in the disrupted range of S. vaginata. The range of S. vaginata may have been more continuous earlier in the Holocene. |
| Chromosomes | 78 (6x). - Europe, Asia (S), Far East (S), Canada. - Numerous reports. Not included: Two reports of 2n = 42 from India (Misra 1966, 1972), probably from another species (or genus). A report of 2n = ca. 66 (5x?) from Chukotka (Probatova and Sokolovskaya 1986). Reports of 2n = 78-87 from Europe (Kalkman and van Wijk 1984), of 2n = 84 from Japan (Uchiyama 1989), and of 2n = 86 from East Chukotka (Yurtsev et al. 1975). The number of 2n = 78 is otherwise very constant in Stuckenia. Some of these reports of other numbers may be due to miscounts or accessory chromosomes. |
| Geography | European (NE): RUS. |
| Distribution | N = S E = R KP = r [ key ] |
| Parent taxon | Stuckenia Börner |
| PAF ID | 240202 |