Marsilea drummondii

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Marsilea drummondii
Marsilea leaf and fiddlehead.jpg
M. drummondii leaf and fiddlehead
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Division: Polypodiophyta
Class: Polypodiopsida
Order: Salviniales
Family: Marsileaceae
Genus: Marsilea
Species:
M. drummondii
Binomial name
Marsilea drummondii
MarsileadrummondiiDistributionMap.png
Occurrence data from the Australasian Virtual Herbarium
Synonyms [1]

Marsilea drummondii var. hirsutissima(A.Braun) Domin
Marsilea drummondii var. howittiana(A.Braun) Domin
Marsilea drummondii f. macra(A.Braun) Domin
Marsilea drummondii var. nardu(A.Braun) Domin
Marsilea drummondii var. oxaloides(A.Braun) Domin
Marsilea drummondii var. sericea(A.Braun) Domin
Marsilea elataA.Braun
Marsilea hirsutissimaA.Braun
Marsilea howittianaA.Braun
Marsilea macraA.Braun
Marsilea macropusHook.
Marsilea muelleriA.Braun
Marsilea narduA.Braun
Marsilea oxaloidesA.Braun
Marsilea salvatrixHanst.
Marsilea sericeaA.Braun
Zaluzianskia drummondii(A.Braun) Kuntze
Zaluzianskia macropus(Hook.) Kuntze

Contents

Marsilea drummondii is a species of fern known by the common name nardoo. [2] It is native to Australia, where it is widespread and common, particularly in inland regions. It is a rhizomatous perennial aquatic fern that roots in mud substrates and produces herbage that floats on the surface of quiet water bodies. It occurs in water up to one metre deep. [3] It occurs in abundance after floods. [4] It can form mats on the water's surface and cover the ground in carpets as floodwaters recede. It is variable in appearance and occurs in many types of wetland habitat. In general the frond is made up of two pairs of leaflets and is borne erect when not floating.

The plant produces sporocarps which can remain viable for 50 years and only release spores after being thoroughly soaked. [3] The sporocarps are dispersed by birds that eat them but cannot digest them, and by flowing water. [3] The sporocarp is used for food by Aboriginal Australians, who collect, roast and grind them to powder which they mix with water to make a dough. [5] [3] [6] [7] The sporocarp can be toxic due to high levels of thiaminase, which destroys thiamine. [2] Consumption of large amounts can cause beriberi. It has been known to poison sheep, [8] as well as humans, including the leaders of the Burke and Wills expedition. [9] Nardoo must be prepared properly using heat before consumption to destroy the thiaminase. [4] [5]

Earliest Australian record

The earliest specimen in an Australian herbarium is MEL 0052999A, which was collected by Alan Cunningham in 1825 in the Brigalow Belt South region out of Gunnedah in the locality of Curlewis. [10]

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References

  1. "Marsilea drummondii A.Braun". Plants of the World Online. The Trustees of the Royal Botanic Gardens, Kew. n.d. Retrieved September 24, 2020.
  2. 1 2 Harford, Tim (September 4, 2019). "How do people learn to cook a poisonous plant safely?". BBC News. Retrieved 4 September 2019.
  3. 1 2 3 4 Marsilea drummondii. ANBG.
  4. 1 2 Thomas, A. Nardoo, the desert fern. ABC Science. March 8, 2007
  5. 1 2 Thomas, Abbie (8 March 2007). "Nardoo, the desert fern". www.abc.net.au. Retrieved 5 September 2019.
  6. Perumal, G. (2010). Ethnomedicinal use of pteridophyte from Kolli Hills, Namakkal District, Tamil Nadu, India. Archived 2012-03-16 at the Wayback Machine Ethnobotanical Leaflets 14 161.
  7. Marsilea drummondii. Archived 2011-02-25 at the Wayback Machine Botanic Gardens Trust, Sydney.
  8. Thiaminase. Cornell Dept. Animal Science.
  9. Earl, J. W. and B. V. McCleary. (1994). Mystery of the poisoned expedition. Nature 368 683–4.
  10. Australasian Virtual Herbarium Record: MEL 0052999A. Retrieved 10 November 2018.