Eucalyptus helidonica

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Eucalyptus helidonica
Eucalyptus helidonica.jpg
Eucalyptus helidonica near Helidon
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Eucalyptus
Species:
E. helidonica
Binomial name
Eucalyptus helidonica
bark Eucalyptus helidonica bark.jpg
bark
flower buds Eucalyptus helidonica buds.jpg
flower buds
fruit Eucalyptus helidonica fruit.jpg
fruit

Eucalyptus helidonica is a species of tree that is endemic to an area near Helidon in Queensland. It has rough, finely fibrous bark, lance-shaped or curved adult leaves that are paler on the lower surface, flower buds in groups of eleven or more, white flowers and shortened spherical or barrel-shaped fruit.

Contents

Description

Eucalyptus helidonica typically grows to a height of around 20 metres (66 ft) and forms a lignotuber. It has rough grey or grey-brown bark and finely fibrous bark over the trunk and the larger branches, smooth on the smaller branches. Young plants and coppice regrowth have sessile, linear to narrow lance-shaped leaves that are arranged in opposite pairs and paler on the lower surface. The juvenile leaves are 60–135 mm (2.4–5.3 in) long and 7–18 mm (0.28–0.71 in) wide. Adult leaves are lance-shaped or curved and dull green but paler on the lower surface, 60–145 mm (2.4–5.7 in) long and 90–250 mm (3.5–9.8 in) wide, tapering evenly to a petiole 9–20 mm (0.35–0.79 in) long. The flower buds are arranged in leaf axils in groups of eleven or more on an unbranched peduncle 10–25 mm (0.39–0.98 in) long, the individual buds on pedicels 3–5 mm (0.12–0.20 in) long. Mature buds are oval, 4–5 mm (0.16–0.20 in) long and about 2 mm (0.079 in) wide with a conical operculum. The flowers are white and the fruit is a woody shortened spherical to barrel-shaped capsule 4–6 mm (0.16–0.24 in) long and 4–7 mm (0.16–0.28 in) wide, with the valves near rim level or enclosed below it. [2] [3]

Taxonomy

Eucalyptus helidonica was first formally described by the botanist Kenneth Hill in 1999 in the journal Telopea . The specific epithet helidonica refers to the town in the centre of this species' distribution. [3] [4]

Eucalyptus helidonica is part of the white mahogany group as recognised by Ken Hill. Others in the group include E. acmenoides , E. mediocris , E. carnea , E. apothalassica , E. latisinensis , E. psammitica and E. umbra . [5]

Distribution

This stringybark is endemic to a small area surrounding the town of Helidon to the west of Brisbane amongst the Great Dividing Range. It is found as a part of dry sclerophyll woodland communities where it is found on sandstone ridges and slopes growing in sandy soils. [2] [3]

Conservation status

This eucalypt is classified as "least concern" under the Queensland Government Nature Conservation Act 1992 . [6]

See also

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

Eucalyptus pellita, commonly known as the large-fruited red mahogany, is a species of medium to tall tree that is endemic to north-eastern Queensland. It has rough, fibrous or flaky bark on the trunk and branches, lance-shaped to egg-shaped adult leaves, flower buds in groups of seven, white flowers and cup-shaped to conical fruit.

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

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

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<i>Corymbia bloxsomei</i> Species of plant

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

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<i>Corymbia leichhardtii</i> Species of plant

Corymbia leichhardtii, commonly known as rustyjacket, Leichhardt's rustyjacket, or yellow jacket, is a species of tree that is endemic to Queensland. It has rough, tessellated bark on the trunk and branches, lance-shaped or curved adult leaves, flower buds in groups of seven, white flowers and barrel-shaped, urn-shaped or shortened spherical fruit.

Eucalyptus delicata is a species of tree that is endemic to Western Australia. It has rough, fibrous to scaly bark on the trunk, smooth white to greyish bark above, linear to narrow lance-shaped adult leaves, flower buds in groups of between seven and eleven, creamy white flowers and more or less spherical to barrel-shaped fruit.

Eucalyptus latisinensis, commonly known as white mahogany, is a species of tree that is endemic to Queensland. It has rough, fibrous to stringy bark, lance-shaped to curved adult leaves, flower buds in groups of seven to eleven or more, white flowers and shortened spherical to hemispherical fruit.

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

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<i>Eucalyptus socialis <span style="font-style:normal;">subsp.</span> eucentrica</i> Subspecies of plant

Eucalyptus socialis subsp. eucentrica, commonly known as the inland red mallee, is a subspecies of mallee that is endemic to inland Australia. It usually has rough bark on the base of the trunk, smooth bark above, lance-shaped adult leaves, flower buds in groups of between seven and eleven, pale creamy yellow flowers and barrel-shaped to urn-shaped or spherical fruit.

References

  1. "Eucalyptus helidonica". Australian Plant Census. Retrieved 25 July 2019.
  2. 1 2 "Eucalyptus helidonica". Euclid. CSIRO . Retrieved 1 June 2020.
  3. 1 2 3 Hill, Ken D. (1999). "A taxonomic revision of the White Mahoganies, Eucalyptus series Acmenoideae (Myrtaceae)". Telopea. 8 (2): 225–226. doi: 10.7751/telopea19993002 .
  4. "Eucalyptus helidonica". APNI. Retrieved 25 July 2019.
  5. "More about White Mahoganies". Euclid. CSIRO. Archived from the original on 14 April 2019. Retrieved 28 October 2018.
  6. "Eucalyptus helidonica". WetlandInfo. Queensland Government . Retrieved 8 November 2016.