Nymphaea immutabilis
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| Nymphaea immutabilis | |
|---|---|
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| Flowering Nymphaea immutabilis at Mount Carbine, Queensland, Australia | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Order: | Nymphaeales |
| Family: | Nymphaeaceae |
| Genus: | Nymphaea |
| Subgenus: | Nymphaea subg. Anecphya |
| Species: | N. immutabilis |
| Binomial name | |
| Nymphaea immutabilis S.W.L.Jacobs[2] | |
_(W3).svg) | |
| Nymphaea immutabilis is native to Western Australia, the Northern Territory, and Queensland, Australia[2] | |
| Synonyms[2] | |
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Nymphaea immutabilis (black-soil waterlily) is a species of waterlily native to the far north of Western Australia, the Northern Territory, and northern and eastern Queensland, Australia.[3][2]
Vegetative characteristics
Nymphaea immutabilis is an annual or perennial plant with globose rhizomes.[4] The round, 70 cm wide leaves have dentate margins.[5][4]
Generative characteristics
The flowers are up to 30 cm in diameter, on pedicels or stalks up to 5 m long;[6] the outer petals are blue, grading to white inner petals.[7] The flowers extend up to 50 cm above the water surface.[5] The flowers have four sepals, and 34 petals. The androecium consists of 400 stamens. The gynoecium consists of 9-20 carpels.[4] The globose, 5 cm wide fruit bears numerous 4 mm long, and 2.5 mm wide, rounded seeds with trichomes arranged in irregular rows.[5] The immature seeds are red, but mature to brownish-grey.[8] The seeds have a mechanism of physiological dormancy.[9]
Cytology
The chromosome count is n = 42. The genome size is 1408.32 Mb.[10]
Reproduction
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.[4]
Placement within Nymphaea
It is placed in Nymphaea subgenus Anecphya.[9]
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.[11][12]
Etymology
The specific epithet immutabilis, meaning unchanging, references the floral colouration, which does not change as the flower ages.[4]