Dracophyllum milliganii

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Dracophyllum milliganii
Dracophyllum milliganii 7519.jpg
Dracophyllum milliganii, Mount Eliza, Southwest National Park
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Ericales
Family: Ericaceae
Genus: Dracophyllum
Species:
D. milliganii
Binomial name
Dracophyllum milliganii
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Natural range

Dracophyllum milliganii is a species of angiosperm in the family Ericaceae and the sub-family Epacridoideae. It is a distinctive alpine shrub, endemic to Western Tasmania.

Contents

Description

Dracophyllum milliganii is grouped into two populations with significantly different appearances and habitats. In alpine and sub-alpine heathland it forms a graminoid shrub about 5 to 20 cm high with 20 cm curling leaves. In alpine rainforests and wet sclerophyll forests, it forms a small tree or erect shrub with stems up to 4 metres and leaves 1 to 1.5 metres long, with a similar habit to Richea pandanifolia. [2] Its leaves have serrulate margins (very finely toothed) and are dark green and grey brown when dead. The leaves are sheathing at the base and highly crowded. The inflorescence is a terminal flower spike with a thick red stem and small white to pink flowers fused into tubes. The leaves of D. milliganii are similar to Richea pandanifolia which forms a large erect tree in rainforests but has small flowers arising from the axis of the stem and highly serrate (toothed) leaf margins. [3]

Habitat and distribution

D. milliganii is endemic to Western and south-western Tasmania. [3] Found in alpine areas above 850 metres altitude, but can survive lower altitudes in its rainforest form. [2] It is found in harsh, open alpine sites on peaty or well-drained rocky soils in areas of regular snow lie. Along with Isophysis tasmanica its presence is useful in determining communities of Tasmanian highland treeless vegetation, as it appears in Western alpine heathland (HHW) and cushion moorlands (HCM). [4]

Taxonomy

The first formal European description of D. milliganii was by botanist Joseph Dalton Hooker in his book Flora Tasmaniae (1860) [5] based on plant material collected at Mount Sorrell by Joseph Milligan, [1] a surgeon and amateur naturalist who attended an expedition to Macquarie Harbour in 1842. J.D Hooker named this and many other species after Milligan, calling him, "'one of the most indefatigable and able of Tasmanian botanists." [6] J. D. Hooker named the genus Dracophyllum after the genus Dracaena or "dragon tree" for their superficially similar foliage. [5] [3]

Phylogeny

Dracophyllum species are distributed around Australasia with large amounts of species in New Zealand and New Caledonia. The genus is closely related to Richea and Sphentonoma and the relationships between D. milliganii and the other genera are still unclear. [7] There are two species of Dracophyllum in Tasmania, Dracophyllum minimum is a species of cushion plant and highly specialised for high wind areas. [2]

Related Research Articles

Tasmanian temperate rainforests

The Tasmanian temperate rain forests are a temperate broadleaf and mixed forests ecoregion in western Tasmania. The ecoregion is part of the Australasian realm, which includes Tasmania and Australia, New Zealand, New Guinea, New Caledonia, and adjacent islands.

<i>Diselma</i> Genus of conifers

Diselma archeri is a species of plant of the family Cupressaceae and the sole species in the genus Diselma. It is endemic to the alpine regions of Tasmania's southwest and Central Highlands, on the western coast ranges and Lake St. Clair. It is a monotypic genus restricted to high altitude rainforest and moist alpine heathland. Its distribution mirrors very closely that of other endemic Tasmanian conifers Microcachrys tetragona and Pherosphaera hookeriana.

<i>Dracophyllum</i> Genus of flowering plants

Dracophyllum is a genus of plants belonging to the family Ericaceae, formerly Epacridaceae. There are 61 species in the genus, mostly shrubs, but also cushion plants and trees, found in New Zealand, Australia, Lord Howe Island and New Caledonia. The name Dracophyllum, meaning dragon-leaf, refers to their strong outward similarity to the unrelated Dracaena, sometimes known as dragon tree. Although dicotyledonous, they resemble primitive monocots with their slender leaves concentrated in clumps at the ends of the branches; they are sometimes called grass-trees.

<i>Athrotaxis cupressoides</i> Species of conifer

Athrotaxis cupressoides, is also known as pencil pine, despite being a species of the family Cupressaceae, and not a member of the pine family. Found either as an erect shrub or as a tree, this species is endemic to Tasmania, Australia. Trees can live for upwards of 1000 years, sustaining a very slow growth rate of approximately 12 mm in diameter per year.

<i>Eucalyptus coccifera</i> Species of eucalyptus

Eucalyptus coccifera, commonly known as the Tasmanian snow gum, is a small to medium-sized tree endemic to Tasmania. It has smooth, grey and cream-coloured bark, elliptic to lance-shaped adult leaves, flower buds in groups of between three and nine, usually white flowers and conical, hemispherical or cup-shaped fruit.

<i>Gaultheria hispida</i> Species of flowering plant

Gaultheria hispida, commonly known as the copperleaf snowberry, is an endemic eudicot of Tasmania, Australia. It is an erect multi-branched shrub, that can be found in wet forests and alpine woodlands. Its berries appear snowy white and leaves are tipped with a copper tinge, hence the common name.

<i>Richea pandanifolia</i> Species of tree

Richea pandanifolia, the pandani or giant grass tree, is a distinctive endemic Tasmanian angiosperm. It is dicot of the family Ericaceae and is found in central, western and south west Tasmania. It is a favourite among hikers and nature lovers.

Pterygopappus

Pterygopappus is a genus of flowering plants in the Gnaphalieae tribe within the daisy family. There is only one known species Pterygopappus lawrencii which is endemic to alpine Tasmania. It forms thick, light blue/green mats with densely packed leaves. It is most common in the mountains of the northeastern part of the island. It is a slow grower and prefers cool, moist environments.

<i>Richea scoparia</i> Species of flowering plant

Richea scoparia, is a wide spread Tasmanian endemic plant. The genus Richea, forms part of the Ericaceae family, which are commonly heath-like shrubs. The name refers to the erect bushy growth habit, described as a broom-like shrub, most commonly referred to as the honey bush or simply scoparia to many bushwalkers.

<i>Persoonia gunnii</i> Species of flowering plant

Persoonia gunnii is a species of flowering plant in the family Proteaceae and is endemic to Tasmania. It is an erect shrub with young branchlets that are hairy at first, spatula-shaped to egg-shaped leaves with the narrower end towards the base, and white to cream-coloured flowers.

<i>Richea sprengelioides</i> Species of flowering plant

Richea sprengelioides is a species of flowering plant in the family Ericaceae. It is one of the 11 species within the genus Richea that are endemic to Australia, of which 9 are found only in Tasmania.

Alpine vegetation refers to the zone of vegetation between the altitudinal limit for tree growth and the nival zone. Alpine zones in Tasmania can be difficult to classify owing to Tasmania's maritime climate limiting snow lie to short periods and the presence of a tree line that is not clearly defined.

<i>Prionotes</i> Genus of flowering plants

Prionotes is a genus of flowering plants endemic to Tasmania, with a single species, Prionotes cerinthoides. Commonly known as climbing heath, it is a temperate rainforest climber or a small scrambling shrub in the mountains. It usually lives in very wet, undisturbed places.

<i>Richea gunnii</i> Species of flowering plant

Richea gunnii, the bog candleheath or Gunns richea, is an endemic Tasmanian angiosperm. It is a dicot of the family Ericaceae and is found in Central, Western and North-east Tasmania.

<i>Orites diversifolia</i> Species of flowering plant

Orites diversifolia (=diversifolius), commonly known as variable orites, is a member of the family Proteaceae and is endemic to Tasmania. The common name stems from the variable form of the leaves, which range from entire and linear to serrated and ovate. It is a common shrub in lowland rainforest, subalpine woodland and scrub.

<i>Epacris corymbiflora</i> Species of flowering plant

Epacris corymbiflora, commonly known as straggling heath, is a plant of the heath family, Ericaceae and subfamily, Epacridoideae. It is a small, erect shrub, with softly pointed, green diamond shaped leaves, and white tubular flowers that form a dense spherical group. Epacris corymbiflora is endemic to Australia's island state of Tasmania and found in heath and coastal vegetation communities.

<i>Dracophyllum minimum</i> Species of plant

Dracophyllum minimum, commonly known as heath cushionplant or claspleaf heath, is a species of bolster cushion plant endemic to Tasmania, Australia. It is a low growing, highly compacted plant with white flowers, commonly found in alpine areas of the south, centre and west of Tasmania.

<i>Dracophyllum muscoides</i> Species of flowering plant in the heath family Ericaceae

Dracophyllum muscoides, commonly known as cushion inaka, is a small cushion plant in the family Ericaceae. It is endemic to New Zealand and is found only in the South Island in sub-alpine regions.

<i>Dracophyllum strictum</i> Species of flowering plant in the heath family Ericaceae

Dracophyllum strictum, commonly known as totorowhiti, is a species of shrub endemic to New Zealand. It was first described by Joseph Dalton Hooker in 1844 and gets the specific epithet strictum for its rigid and packed together leaves. In the heath family Ericaceae, it inhabits lowland up to montane forest and shrubland and reaches a height of 50–300 cm.

References

  1. 1 2 "Dracophyllum milliganii ". Australian Plant Name Index (APNI), IBIS database. Centre for Plant Biodiversity Research, Australian Government, Canberra. Retrieved 2009-12-18.
  2. 1 2 3 "Dracophyllum milliganii ". Key to Tasmanian Vascular Plants. University of Tasmania. Retrieved 2009-12-18.
  3. 1 2 3 "Dracophyllum milliganii". Australian Native Plants Society (2018).
  4. "The Vegetation Communities: Highland treeless vegetation (2017)" (PDF). From Forest to Fjaeldmark, edition 2. Department of Primary Industries, Parks, Water and Environment.
  5. 1 2 Hooker, J. D., Flora Tasmaniae, Volume 2 (1860), Lords Commissioners of the Admiralty, London. Available at:https://play.google.com/books/reader?id=mhMWAAAAYAAJ&hl=en&pg=GBS.PA158
  6. Hoddinott W. G. "Milligan, Joseph (1807-1884)". Australian Dictionary of Biography, 1967.
  7. Venter, S."A taxonomic revision of the Australasian genera Dracophyllum and Richea (Richeeae: Styphelioideae: Ericaceae)" (2021) Australian Systematic Botany,34. doi:10.1071/SB19049