Nuphar × fluminalis is a species of rhizomatous aquatic plant endemic to Japan. It is a natural hybrid of Nuphar japonica and Nuphar submersa.
Description Vegetative characteristics Nuphar × fluminalis has an intermediate appearance and falls between Nuphar japonica and Nuphar submersa. The submerged leaves are ovate.
Generative characteristics The filaments are recurved. The anthers display orange-red colouration. The stigmatic disk, as well as the fruit, also display orange-red colouration.Shiga, T., & Kadono, Y. (2007). Nuphar × fluminalis, a new hybrid from central Japan. Acta Phytotaxonomica et Geobotanica, 58(1), 43-50.
Reproduction Generative reproduction Sexual reproduction occurs within this hybrid.
Taxonomy Publication It was first described by Takashi Shiga and Yasuro Kadono in 2007.
Etymology The nothospecific epithet fluminalis, from the Latin fluminalis, means stream or river.William, R. T., & Strongman, D. B. (2012). Two new genera of fungal trichomycetes, Bactromyces and Laculus (Harpellales), from Nova Scotia, Canada. Botany, 90(2), 101-111.
Conservation It is critically endangered. Only four populations are known.Shiga, T., Yokogawa, M., Kaneko, S., & Isagi, Y. (2013). Genetic identification of traded plants of the endangered macrophytes Nuphar submersa and N. × fluminalis (Nymphaeaceae) based on genotype data of all remnant individuals growing in the wild.
Ecology Habitat It occurs in streams and rivers.
References