Nymphaea immutabilis
Flowering Nymphaea immutabilis in cultivation at the Berlin Botanical Garden and Botanical Museum
Flowering Nymphaea immutabilis in cultivation at the Royal Botanic Gardens, Kew
Special Least Concern (NCA)[1]
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Order: Nymphaeales
Family: Nymphaeaceae
Genus: Nymphaea
Species:
N. immutabilis
Binomial name
Nymphaea immutabilis
S.W.L.Jacobs[2]
Nymphaea immutabilis is native to Western Australia, the Northern Territory, and Queensland, Australia[2]
Synonyms[2]
  • Nymphaea lotus var. australis F.M.Bailey

Nymphaea immutabilis is a species of waterlily native to Western Australia, the Northern Territory, and Queensland, Australia.[2]

Description

Vegetative characteristics

Nymphaea immutabilis is an annual or perennial plant with globose rhizomes.[3] The round, 70 cm wide leaves have dentate margins.[4][3]

Generative characteristics

The flowers extend up to 50 cm above the water surface.[4] The flowers have four sepals, and 34 petals. The androecium consists of 400 stamens. The gynoecium consists of 9-20 carpels.[3] The globose, 5 cm wide fruit bears numerous 4 mm long, and 2.5 mm wide, rounded seeds with trichomes arranged in irregular rows.[4] Immature seeds are red, but mature to brownish-grey seeds.[5] The seeds have a mechanism of physiological dormancy.[6]

Cytology

The chromosome count is n = 42. The genome size is 1408.32 Mb.[7]

Reproduction

Generative reproduction

Flowering occurs from March to November.[4][3]

Taxonomy

Publication

It was first described by Surrey Wilfrid Laurance Jacobs in 1992.[2]

Type specimen

The type specimen was collected by S. Jacobs and J. Clarkson near Mareeba, Queensland, Australia on the 26th of July 1987.[3]

Placement within Nymphaea

It is placed in Nymphaea subgenus Anecphya.[6]

Separation of Nymphaea kimberleyensis

The subspecies Nymphaea immutabilis subsp. kimberleyensis S.W.L.Jacobs was described in 1992. Later in 2011, it was elevated to a separate species Nymphaea kimberleyensis (S.W.L.Jacobs) S.W.L.Jacobs & Hellq.[8][9]

Etymology

The specific epithet immutabilis, meaning unchanging, references the floral colouration, which does not change as the flower ages.[3]

Conservation

The NCA status of Nymphaea immutabilis is Special Least Concern (SL).[1] In the Northern Territory it is categorised as vulnerable.[10][11]

Ecology

Habitat

It occurs in swamps,[6] permanent, or temporary waters,[3] billabongs, streams, and rivers.[5]

References

  1. 1 2 Queensland Government. (2022e, March 8). Species profile — Nymphaea immutabilis. Retrieved January 2, 2024, from https://apps.des.qld.gov.au/species-search/details/?id=21929
  2. 1 2 3 4 5 "Nymphaea immutabilis S.W.L.Jacobs". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2 January 2024.
  3. 1 2 3 4 5 6 7 Jacobs, S. W. L. (1992). "New species, lectotypes and synonyms of Australasian Nymphaea (Nymphaeaceae)." Telopea, 4(4), 635-641.
  4. 1 2 3 4 Stephens, K. M., Dowling, R. M. (2002). "Wetland Plants of Queensland: A Field Guide." p. 56. Kokosinsel (Keeling): CSIRO Publishing.
  5. 1 2 Dalziell, E. L. (2016). "Seed biology and ex situ storage behaviour of Australian Nymphaea (water lilies): implications for conservation (Doctoral dissertation, PhD thesis. University of Western Australia, Perth, WA)."
  6. 1 2 3 Dalziell, E. L., Baskin, C. C., Baskin, J. M., Young, R. E., Dixon, K. W., & Merritt, D. J. (2019). "Morphophysiological dormancy in the basal angiosperm order Nymphaeales." Annals of botany, 123(1), 95-106.
  7. ↑ Chen, F., Liu, X., Yu, C., Chen, Y., Tang, H., & Zhang, L. (2017). "Water lilies as emerging models for Darwin’s abominable mystery." Horticulture research, 4.
  8. ↑ Jacobs, S. W., & Hellquist, C. B. (2011). "New species, possible hybrids and intergrades in Australian Nymphaea (Nymphaeaceae) with a key to all species." Telopea, 13(1-2), 233-243.
  9. ↑ "Nymphaea kimberleyensis (S.W.L.Jacobs) S.W.L.Jacobs & Hellq". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2 January 2024.
  10. ↑ White, M., Albrecht, D., Duguid, A., Latz, P., & Hamilton, M. (2000). "Plant species and sites of botanical significance in the southern bioregions of the Northern Territory. Volume 1: significant vascular plants."
  11. ↑ Fisher, A., Baker, B., & Woinarski, J. (2002). "Mitchell Grass Downs, Northern Territory."
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