Melaleuca halmaturorum

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Swamp paperbark
Melaleuca halmaturorum (leaves, flowers, fruits).JPG
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Melaleuca
Species:
M. halmaturorum
Binomial name
Melaleuca halmaturorum
Synonyms [2]
  • Melaleuca cymbifolia Benth.
  • Melaleuca halmaturorum subsp. cymbifolia(Benth.) Barlow

Melaleuca halmaturorum, commonly known as South Australian swamp paperbark, kangaroo honey-myrtle or salt paper-bark is a plant in the myrtle family, Myrtaceae and is endemic to Western Australia, South Australia and Victoria. It is often a tree with an unusual, crooked form, sometimes looking like an enlarged example of bonsai.

Contents

Description

Melaleuca halmaturorum is a slow growing shrub or small tree, eventually growing to 6–8 m (20–30 ft) tall, often with a crooked, straggling, irregular or untidy form and creamy-grey, papery bark. Its leaves are dark green, glabrous and arranged in alternate pairs at right angles to the ones above and below (decussate), so that there are four rows of leaves along the stem. The leaves are linear to lance-shaped, 2.6–9 mm (0.1–0.4 in) long, 0.7–1.8 mm (0.03–0.07 in) wide, with many distinct oil glands on the lower surface and a stalk about 1 mm (0.04 in) long. [2] [3] [4]

The flowers are white or cream and arranged in heads, sometimes on the ends of branches which continue to grow after flowering but also in the upper leaf axils. The heads are up to 15 mm (0.6 in) in diameter and contain up to five individual flowers. The flower buds are surrounded by brown, papery bracts which fall off as the flowers open. The petals are 2–4 mm (0.08–0.2 in) long and fall off as the flowers age. The stamens are arranged in bundles of five around the flower, usually with 6 to 17 stamens in each bundle. Flowering occurs from August to October and the fruit which follow are woody, cup-shaped capsules 3–5.5 mm (0.1–0.2 in) long and wide in loose clusters along the stem. The clusters remain in place for several seasons. [2] [3] [4]

Habit on the edge of a salt lake near Hyden Melaleuca halmaturorum (habit).JPG
Habit on the edge of a salt lake near Hyden
Bark Melaleuca halmaturorum (bark).JPG
Bark

Taxonomy and naming

Ferdinand von Mueller was the first to give a formal description of Melaleuca halmaturorum but his description was not validly published. The first formal, valid description was by the Dutch botanist, Friedrich Miquel in 1856 and published in Nederlandsch Kruidkundig Archief . [5] [6] The type specimen was collected "Ad flumen three-Wells-river insulae Halmaturorum", [6] a Latin phrase meaning "near the Three Wells River on Kangaroo Island". Halmaturus was an earlier name for a genus of kangaroo. [7] Three Wells River was later named the Morgan, then the Cygnet. [8] The specific epithet (halmaturorum) refers to Kangaroo Island where the type specimen was collected. [2]

Distribution and habitat

Melaleuca halmaturorum occurs in southern parts of Western Australia, South Australia and Victoria. In Western Australia it is found in the Eremaean and South-West botanical provinces. [9] [10] In South Australia it occurs in the Eyre Peninsula, Murray, Yorke Peninsula, Southern Lofty, Kangaroo Island and South-Eastern bioregions. [4] [11] In Victoria it occurs in the Mallee, Loddon Murray, Central and Northern and Wimmera bioregions but is becoming rare due to invasion by tall wheat grass ( Lophopyrum ponticum ). [12] [13] [14] Melaleuca halmaturorum is salt tolerant and often found in swampy, waterlogged areas such as estuaries, coastal dunes and the fringes of salt lakes. [15]

Conservation status

This melaleuca is listed as "not threatened" (in Western Australia) by the Government of Western Australia Department of Parks and Wildlife. [9]

Use in horticulture

Melaleuca halmaturorum is a very hardy plant in full sun. [16] It is often used in revegetation to remediate and stabilise saline sites. [15]

Related Research Articles

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References

  1. ↑ "Melaleuca halmaturorum". Plants of the World Online. Retrieved 30 August 2021.
  2. 1 2 3 4 Brophy, Joseph J.; Craven, Lyndley A.; Doran, John C. (2013). Melaleucas : their botany, essential oils and uses. Canberra: Australian Centre for International Agricultural Research. p. 186. ISBN   9781922137517.
  3. 1 2 Holliday, Ivan (2004). Melaleucas : a field and garden guide (2nd ed.). Frenchs Forest, N.S.W.: Reed New Holland Publishers. pp. 132–133. ISBN   1876334983.
  4. 1 2 3 "Melaleuca halmaturorum". State herbarium of South Australia: electronic flora of South Australia. Retrieved 6 May 2015.
  5. ↑ Miquel, Friedrich (1856). "Stirpes Novo-Hollandas a Ferd Mullero collectas determinavit". Nederlandsch Kruidkundig Archief. 4 (1): 122. Retrieved 6 May 2015.
  6. 1 2 "Melaleuca halmaturorum". APNI. Retrieved 6 May 2015.
  7. ↑ "Macropus (Notamacropus) agilis". The Paleobiology database. Retrieved 17 December 2021.
  8. ↑ "Kangaroo Island before 1836". History South Australia. Retrieved 6 May 2015.
  9. 1 2 "Melaleuca halmaturorum". FloraBase . Western Australian Government Department of Parks and Wildlife.
  10. ↑ Paczkowska, Grazyna; Chapman, Alex R. (2000). The Western Australian flora : a descriptive catalogue. Perth: Wildflower Society of Western Australia. p. 394. ISBN   0646402439.
  11. ↑ Thackway, R.; Cresswell, I. D. (1995). An interim biogeographic regionalisation for Australia : a framework for setting priorities in the National Reserves System Cooperative Program (Version 4.0 ed.). Canberra: Australian Nature Conservation Agency, Reserve Systems Unit. ISBN   0642213712.
  12. ↑ "Melaleuca halmaturorum". Government of Victoria Department of Economic Development, Jobs, Transport and Resources. Retrieved 7 May 2015.
  13. ↑ Messina, Andre. "Melaleuca halmaturorum". Royal Botanic Gardens Victoria - vicflora. Retrieved 15 October 2017.
  14. ↑ "Tall wheat grass (Lophopyrum ponticum) invasion" (PDF). Australian Government Department of the Environment. Retrieved 15 October 2017.
  15. 1 2 "Melaleuca halmaturorum". Florabank. Retrieved 7 May 2015.
  16. ↑ Wrigley, John W.; Fagg, Murray (1983). Australian native plants : a manual for their propagation, cultivation and use in landscaping (2 ed.). Sydney: Collins. p. 264. ISBN   0002165759.
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