Nuphar submersa
| Nuphar submersa | |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Order: | Nymphaeales |
| Family: | Nymphaeaceae |
| Genus: | Nuphar |
| Species: | N. submersa
|
| Binomial name | |
| Nuphar submersa Shiga & Kadono[1]
| |
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| Nuphar submersa is endemic to Japan[1] | |
Nuphar submersa is a species of rhizomatous aquatic plant endemic to Japan.[1]
Description[edit]
Vegetative characteristics[edit]
Nuphar submersa is a perennial aquatic herb with slim, branching, prostrate rhizomes. It rarely produced floating leaves. The petiolate, narrowly oblong-triangular, membranous submerged leaves with an undulate margin are 10-18 cm long, and 2-5 cm wide. The petiolate, narrowly ovate floating leaves have a cordate-saggitate base. The petioles are flattened.[2]
Generative characteristics[edit]
The 2-3 cm wide, pedunculated flowers emerge above the water surface. They have five obovate, yellow sepals, which are 1-2 cm long. The 5-7 mm long petals are spatulate. The stamens are recurved after anthesis. The gynoecium consists of many fused carpels. The red, ovoid, 2-3 cm long fruit bears numerous ovoid, 3.5-4.5 mm long, and 2.5-3.5 mm wide seeds.[2]
Reproduction[edit]
Vegetative reproduction[edit]
Nuphar submersa can reproduce clonally.[3]
Generative reproduction[edit]
Flowering occurs from June to October.[2]
Taxonomy[edit]
Publication[edit]
It was first described by Takashi Shiga and Yasuro Kadono in 2006.[1]
Type specimen[edit]
The type species was collected by T. Shiga at an altitude of 240 m in Koshiro, Imaichi-shi, Tochigi prefecture, Japan on the 29th of September 2004.[2]
Natural hybridisation[edit]
Together with Nuphar japonica DC., it forms the natural hybrid Nuphar × fluminalis Shiga & Kadono.[4][5]
Etymology[edit]
The specific epithet submersa, from the Latin submersa, means submerged.[6]
Conservation[edit]
It is critically endangered.[7][8][3]
Ecology[edit]
Habitat[edit]
It occurs in rivers and streams.[2]
References[edit]
- ^ a b c d "Nuphar submersa Shiga & Kadono". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 18 January 2024.
- ^ a b c d e Shiga, T., ISHII, J., ISAGI, Y., & KADONO, Y. (2006). "Nuphar submersa (Nymphaeaceae), a new species from central Japan." Acta Phytotaxonomica et Geobotanica, 57(2), 113-122.
- ^ a b Shiga, T., Yokogawa, M., Kaneko, S., & Isagi, Y. (2017). "Genetic diversity and population structure of Nuphar submersa (Nymphaeaceae), a critically endangered aquatic plant endemic to Japan, and implications for its conservation." Journal of plant research, 130(1), 83-93.
- ^ Nuphar submersa | International Plant Names Index. (n.d.-b). Retrieved January 18, 2024, from https://www.ipni.org/n/77076926-1
- ^ Shiga, T., & Kadono, Y. (2007). "Nuphar × fluminalis, a new hybrid from central Japan." Acta Phytotaxonomica et Geobotanica, 58(1), 43-50.
- ^ Monteiro, J. S., Gusmão, L. F. P., & Castañeda-Ruiz, R. F. (2014). "Two new microfungi from Brazilian Amazon Forest: Atrogeniculata submersa and Nigrolentilocus amazonicus." Mycotaxon, 127(1), 39-45.
- ^ Yokogawa, M., Shiga, T., Kaneko, S., & Isagi, Y. (2012). "Development of nuclear microsatellite markers for the critically endangered freshwater macrophyte, Nuphar submersa (Nymphaeaceae), and cross-species amplification in six additional Nuphar taxa." Conservation Genetics Resources, 4, 295-298.
- ^ 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." Japanese Journal of Conservation Ecology, 18(1), 33-44.