Nymphaea × borealis explained

Nymphaea × borealis is a species of waterlily native to Sweden, Poland, Germany, the Czech Republic, and East European Russia. It is a natural hybrid of Nymphaea alba and Nymphaea candida.

Description

Generative characteristics

The filament is lanceolate. The yellow stigma has a hemispherical, short projection in the centre of the stigma.

Cytology

It exhibits an intermediate genome size.^[1]

Reproduction

Generative reproduction

Nymphaea × borealis exhibits lower fertility and pollen production.

Natural hybridisation

Nymphaea × borealis can be formed in areas of sympatric occurrence of the parent species, but the natural hybridisation of both parent species is not very frequent. Genetically confirmed hybrids are a rare occurrence.^[2]

Taxonomy

Publication

It was first described by Edmond Gustave Camus in 1898.

Notes and References

1. Dąbrowska, M., Skubała, K., Volkova, P., Suda, J., & Zalewska-Gałosz, J. (2015). "Genome size and phenotypic variation of Nymphaea (Nymphaeaceae) species from Eastern Europe and temperate Asia." Acta Societatis Botanicorum Poloniae, 84(2).
2. Kabatova, K., Vit, P., & Suda, J. (2014). "Species boundaries and hybridization in central-European Nymphaea species inferred from genome size and morphometric data." Preslia, 86(2), 131-154.