Biology:Nymphaea dimorpha

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Short description: Species of water lily

Nymphaea dimorpha
Nymphaea dimorpha I.M.Turner.jpg
Nymphaea dimorpha I.M.Turner with scale bar (10 cm) against a white background
Nymphaea minuta Botanical garden.jpg
Nymphaea dimorpha cultivated in the Berlin Botanical Garden and Botanical Museum
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Order: Nymphaeales
Family: Nymphaeaceae
Genus: Nymphaea
Species:
N. dimorpha
Binomial name
Nymphaea dimorpha
I.M.Turner[1]
Madagascar in the world (W3).svg
Nymphaea dimorpha is endemic to Madagascar[1]
Synonyms[1]
  • Nymphaea minuta K.C.Landon, R.A.Edwards & Nozaic

Nymphaea dimorpha is a species of waterlily endemic to Madagascar.[1]

Description

Detail of cleistogamous Nymphaea dimorpha I.M.Turner flower with scale bar (3 cm)
Surface leaf of Nymphaea dimorpha I.M.Turner with scale bar (10 cm). The abaxial leaf surface (a) is depicted on the left side of the image. The adaxial leaf surface (b) is depicted on the right side.
Submerged leaf of Nymphaea dimorpha I.M.Turner with scale bar (5 cm). The abaxial leaf surface (a) is depicted on the left side of the image. The adaxial leaf surface (b) is depicted on the right side.
Detail of Nymphaea dimorpha I.M.Turner ovary with numerous ovules
Cleistogamous Nymphaea dimorpha I.M.Turner flower (b) with cross section of pedicel (a)
Nymphaea dimorpha I.M.Turner seedling

This species exhibits two distinctive growth forms. The submerged growth form has very thin foliage with short petioles. The emergent form has floating leaves with longer petioles.[2]

Cytology

The chromosome count is n = 14. The genome size is 449.88 Mb.[3]

Reproduction

Generative reproduction

Cleistogamy occurs in this species. It can produce flowers, which never open, but self-fertilise and never reach the water surface.[2][4]

Habitat

It grows in pools of water among slowly flowing streams.[2] The pools, which are darkened with organic material, are shaded by the canopy of tropical forest.[5]

Taxonomy

Taxonomic history

This species was first described as Nymphaea minuta K.C.Landon, R.A.Edwards & Nozaic in 2006. Later, it was discovered that this was a Nomen illegitimum, as the name was preoccupied by the French fossil waterlily Nymphaea minuta Saporta described in 1890. Therefore, the new name Nymphaea dimorpha I.M.Turner was chosen in 2014.[6]

Type specimen

The type specimen was collected in shaded rain pools beneath coastal forest near Tampolo, Madagascar in 1999.[7]

Placement within Nymphaea

It is a member of Nymphaea subgen. Brachyceras.[2]

Etymology

The specific epithet dimorpha references the two distinctive growth forms of this species.[6] The prefix di- means "two",[8] and -morph means shape.[9]

Cultivation

It is easily cultivated and suitable for low-light conditions.[2] In cultivation it may grow four times larger than plants observed in their natural habitat. This is due to better fertilisation.[5] It is very sensitive to cold temperatures.[10]

It is used in hybridisation to create new smaller waterlily cultivars.[4]

References

  1. 1.0 1.1 1.2 1.3 "Nymphaea dimorpha I.M.Turner" (in en). Royal Botanic Gardens, Kew. http://www.plantsoftheworldonline.org/taxon/77143787-1. Retrieved 12 July 2023. 
  2. 2.0 2.1 2.2 2.3 2.4 Landon, Kenneth; Edwards, Richard A.; Nozaic, P. Ivan (2006). "A New Species of Waterlily (Nymphaea minuta: Nymphaeaceae) from Madagascar". SIDA, Contributions to Botany 22 (2): 887–893. ISSN 0036-1488. https://www.jstor.org/stable/41969055. 
  3. 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.
  4. 4.0 4.1 Sacher, R. (2008, February). This tiny waterlily brings new potential for small hybrids - Lusty Li’l Nymphaea minuta. Water Gardeners International. Retrieved July 12, 2023
  5. 5.0 5.1 Landon, K. C., Edwards, R. A., & Nozaic, I. P. (2005). A New Species of Waterlily, Nymphaea sp., from Madagascar. Water Garden Journal, 20(4).
  6. 6.0 6.1 Turner, I. M. (2014, October). "Names of extant angiosperm species that are illegitimate homonyms of fossils." In Annales Botanici Fennici (Vol. 51, No. 5, pp. 305-317). Finnish Zoological and Botanical Publishing Board.
  7. Nymphaea minuta | International Plant Names Index. (n.d.). Retrieved July 12, 2023, from https://www.ipni.org/n/60445240-2
  8. Di definition and meaning | Collins English Dictionary. (2023). Retrieved July 13, 2023, from https://www.collinsdictionary.com/dictionary/english/di
  9. Morph definition and meaning | Collins English Dictionary. (2023). Retrieved July 13, 2023, from https://www.collinsdictionary.com/dictionary/english/morph
  10. Yang, K. (2022). "Leaf Anatomic Structure and Cold Tolerance Evaluation of 6 Nymphaea Species." Plant Gene and Trait, 13.

Wikidata ☰ Q42890652 entry