Eucalyptus insularis

Last updated

Twin Peak Island Mallee
Eucalyptus insularis.jpg
Eucalyptus insularis growing at Cape Le Grande
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Eucalyptus
Species:
E. insularis
Binomial name
Eucalyptus insularis

Eucalyptus insularis, commonly known as Twin Peak Island mallee, [2] or North Twin Peak Island mallee, [3] is a species of mallee that is endemic to a small area of southern Western Australia. It has mostly smooth bark, dull green, linear adult leaves, flower buds in group of between nine and twenty or more, white flowers and barrel-shaped fruit.

Contents

buds Eucalyptus insularis buds.jpg
buds
fruit Eucalyptus insularis fruit.jpg
fruit

Description

Eucalyptus insularis is a mallee that typically grows to a height of 1.5 to 8 metres (5 to 26 ft) and forms a lignotuber. It has smooth greyish bark, sometimes with rough, fibrous bark on larger stems. Young plants and coppice regrowth have sessile, oblong to lance-shaped leaves 35–55 mm (1.4–2.2 in) long and 8–15 mm (0.31–0.59 in) wide arranged in opposite pairs. Adult leaves are arranged alternately, the same dull green colour on both sides, linear in shape, 28–55 mm (1.1–2.2 in) long and 4–7 mm (0.16–0.28 in) wide on a petiole 4–8 mm (0.16–0.31 in) long. The flower buds are arranged in leaf axils in groups of between nine and twenty or more on a pendulous peduncle 3–8 mm (0.12–0.31 in) long, the individual buds on pedicels 2–4 mm (0.079–0.157 in) long. Mature buds are oval, 4–6 mm (0.16–0.24 in) long and 2–3 mm (0.079–0.118 in) wide with a rounded to conical operculum. Flowering occurs in August and the flowers are white or creamy white. The fruit is a woody, barrel-shaped capsule 7–8 mm (0.28–0.31 in) long and 5–6 mm (0.20–0.24 in) wide with the valves near rim level. [2] [3] [4] [5]

Taxonomy and naming

Eucalyptus insularis was first formally described in 1974 by Ian Brooker from a specimen collected on North Twin Peak Island in the Recherche Archipelago and the description was published in the journal Nuytsia . [5] [6] The specific epithet (insularis) is a Latin word meaning 'of an island', referring to the location of the type specimen. [3]

In 2014, Dean Nicolle and Ian Brooker described to subspecies of E. insularis and the names have been accepted by the Australian Plant Census: [7]

Distribution and habitat

The Twin Peak Island mallee grows in closed shrubland and heath near granite outcrops. Subspecies continentalis is only known from two or three populations on the mainland in the Cape Le Grand National Park and subspecies insularis only grows on North Twin Peak Island. [7]

Conservation status

Twin Peak Island mallee is listed as "endangered" under the Australian Government Environment Protection and Biodiversity Conservation Act 1999. [10]

Subspecies continentalis is listed as "Threatened Flora (Declared Rare Flora — Extant)" by the Department of Environment and Conservation (Western Australia). [11] Subspecies insularis is listed as is classified as "Priority Four", [12] meaning that is rare or near threatened. [13] The main threat to the species is increasing fragmentation and loss of remnant populations. [10]

See also

Related Research Articles

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

Eucalyptus erythronema, commonly known as the red-flowered mallee, is a species of mallee or tree and is endemic to Western Australia. It has smooth, dark pink to red bark that is shed to reveal whitish bark, and has lance-shaped adult leaves, pendulous flower buds mostly arranged in groups of three, red or yellow flowers and conical fruit.

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

Eucalyptus calcicola, commonly known as the Boranup mallee, Harry Butler's mallee or Hamelin Bay mallee, is a mallee that is endemic to a small area in the south-west of Western Australia. It has smooth, pale greenish bark, lance-shaped to curved adult leaves, flower buds in groups of seven or nine, white flowers and ribbed, cup-shaped to hemispherical fruit.

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

Eucalyptus capillosa, commonly known as wheatbelt wandoo, or mallee wandoo, is a species of tree or mallee that is endemic to Western Australia. It has smooth, grey bark, lance-shaped to elliptic adult leaves, spindle-shaped flower buds in groups of nine to thirteen, white flowers and barrel-shaped to cylindrical fruit.

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

Eucalyptus effusa, commonly known as rough-barked gimlet, is a species of mallee or small tree that is endemic to Western Australia. It has thin, rough bark on the base of the trunk, smooth bark above, linear to narrow lance-shaped adult leaves, flower buds arranged in groups of seven, white flowers and cup-shaped to conical fruit.

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

Eucalyptus gittinsii, commonly known as northern sandplain mallee, is a species of mallee that is endemic to Western Australia. It has smooth greyish bark, sometimes with rough flaky bark near the base, lance-shaped to curved adult leaves, flower buds in groups of three, whitish flowers and cylindrical to barrel-shaped fruit.

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

Eucalyptus goniantha, commonly known as Jerdacuttup mallee, is a species of mallee, or rarely a tree, that is endemic to Western Australia. It has smooth bark, lance-shaped adult leaves, flower buds in groups of between seven and eleven, creamy white flowers and more or less ribbed, hemispherical fruit.

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

Eucalyptus jutsonii, commonly known as Jutson's mallee, is a species of mallee that is endemic to Western Australia. It has rough, fibrous bark on its stems, smooth pinkish to greyish brown bark above, glossy green, linear adult leaves, flower buds in groups of seven, cream-coloured flowers and shortened spherical fruit.

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

Eucalyptus ligulata, commonly known as Lucky Bay mallee, is a mallee that is native to a few small areas along the south coast of Western Australia. It has smooth bark on the trunk and branches, narrow lance-shaped leaves, flower buds in groups of between nine and thirteen, creamy white flowers and cup-shaped or barrel-shaped fruit with shallow ribs on the sides.

Eucalyptus phenax, commonly known as green dumosa mallee or white mallee, is a species of mallee that is endemic to southern Australia. It has smooth bark, lance-shaped adult leaves, flower buds in groups of seven or nine, white flowers and cup-shaped to cylindrical fruit.

Eucalyptus pluricaulis, commonly known as the purple-leaved mallee, is a species of mallee that is endemic to Western Australia. It has smooth bark, dull bluish green, lance-shaped leaves, flower buds in groups of between nine and fifteen, pale yellow flowers and cylindrical to barrel-shaped fruit.

Eucalyptus subangusta is a species of tree, mallee or mallet that is endemic to the southwest of Western Australia. It has smooth bark, narrow lance-shaped leaves, flower buds in groups of up to nineteen, white flowers and cup-shaped to barrel-shaped fruit.

Eucalyptus suggrandis is a species of mallee that is endemic to the southwest of Western Australia. It has smooth, shiny bark, linear to elliptical leaves, flower buds in groups of three or seven, creamy white flowers and cup-shaped to conical fruit.

Eucalyptus thamnoides is a species of mallee that is endemic to south western Western Australia. It has smooth bark, lance-shaped adult leaves, flower buds in groups of seven, cream-coloured to pale yellow flowers and cup-shaped, conical or bell-shaped fruit.

Eucalyptus vegrandis, commonly known as the Ongerup mallee, is a species of mallee that is endemic to the south-west of Western Australia. It has smooth bark, linear to lance-shaped adult leaves, flower buds in groups of seven, creamy white flowers and cup-shaped or conical fruit.

<i>Eucalyptus conglobata</i> Species of plant

Eucalyptus conglobata, also known as the cong mallee or Port Lincoln mallee, is a species of eucalypt that is native to the south coast of Western Australia and South Australia. It is a mallee with smooth bark, lance-shaped adult leaves, flower buds in groups of seven, white flowers and clustered hemispherical fruit.

<i>Eucalyptus crucis</i> Species of grass

Eucalyptus crucis is a species of mallee that is endemic to Western Australia. There are three subspecies, commonly known as silver mallee or Southern Cross mallee,, narrow-leaved silver mallee, and Paynes Find mallee,. It has rough bark that is shed in curling flakes, more or less round, glaucous juvenile leaves, egg-shaped intermediate leaves and lance-shaped adult leaves. The type of bark and the proportion of juvenile, intermediate and adult leaves in the crown of mature plants varies with subspecies. The flower buds are arranged in groups of seven in leaf axils, the flowers are whitish to pale yellow and the fruit is a conical to hemispherical capsule.

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

Eucalyptus alatissima is a mallee that is endemic to central parts of the Great Victoria Desert. It has rough bark on the lower part of its stems, smooth tan to cream-coloured bark on its upper parts, egg-shaped to lance-shaped leaves and buds in groups of three. The buds have a powdery covering and are prominently winged.

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

Eucalyptus adesmophloia is a mallee that is endemic to the south-west of Western Australia. Its fresh bark is grey, the leaves are a glossy dark green, the flowers are white and borne in large groups, and the fruits are conical to hemispherical.

<i>Eucalyptus canescens</i> Species of plant

Eucalyptus canescens, commonly known as the Ooldea Range mallee or Beadell's mallee, depending on subspecies, is a species of mallee that is endemic to southern Australia. It has rough bark from the base of the trunk to the thicker branches, smooth bark on the thin branches, egg-shaped to lance-shaped adult leaves, flower buds in groups of between seven and eleven, creamy white flowers and smooth cup-shaped to conical, and sometimes ribbed fruit.

Eucalyptus distuberosa is a species of mallet that is endemic to the south-west of Western Australia. It has smooth dark grey to tan-coloured or creamy white bark, glossy dark green, lance-shaped adult leaves, flower buds in groups of seven, white flowers and cup-shaped to conical fruit.

References

  1. ↑ "Eucalyptus insularis". Australian Plant Census. Retrieved 31 July 2019.
  2. 1 2 "Eucalyptus insularis". FloraBase . Western Australian Government Department of Parks and Wildlife.
  3. 1 2 3 "Eucalyptus insularis". Euclid: Centre for Australian National Biodiversity Research. Retrieved 1 June 2020.
  4. ↑ Chippendale, George M. "Eucalyptus insularis". Flora of Australia. Australian Biological Resources Study, Department of the Environment and Energy, Canberra. Retrieved 31 July 2019.
  5. 1 2 Brooker, M. Ian H. (1974). "Six new species of Eucalyptus from Western Australia". Nuytsia. 1 (4): 308–310. Retrieved 31 July 2019.
  6. ↑ "Eucalyptus insularis". APNI. Retrieved 31 July 2019.
  7. 1 2 3 Nicolle, Dean; Brooker, M. Ian H.; French, Malcolm E. (2014). "A new subspecies of the threatened moncalypt Eucalyptus insularis (Myrtaceae) from Western Australia" (PDF). Nuytsia. 24: 249–253. Retrieved 31 July 2019.
  8. ↑ "Eucalyptus insularis subsp. continentalis". Australian Plant Census. Retrieved 31 July 2019.
  9. ↑ "Eucalyptus insularis subsp. insularis". Australian Plant Census. Retrieved 31 July 2019.
  10. 1 2 "Approved Conservation Advice for Eucalyptus insularis (Twin Peak Island Mallee)" (PDF). Australian Government Department of the Environment. Retrieved 31 July 2019.
  11. ↑ "Eucalyptus insularis subsp. continentalis". FloraBase . Western Australian Government Department of Parks and Wildlife.
  12. ↑ "Eucalyptus insularis subsp. insularis". FloraBase . Western Australian Government Department of Parks and Wildlife.
  13. ↑ "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 31 July 2019.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.