Eucalyptus blaxellii

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Howatharra mallee
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Eucalyptus
Species:
E. blaxellii
Binomial name
Eucalyptus blaxellii

Eucalyptus blaxellii, commonly known as the Howatharra mallee, [3] is a mallee that is endemic to Western Australia. It has smooth bark, linear to narrow lance-shaped adult leaves, flower buds arranged in groups of seven, white flowers and cup-shaped to conical fruit.

Contents

Description

Eucalyptus blaxellii is a multi-stemmed mallee that typically grows to a height of 1 to 4 metres (3 to 13 ft). The bark is smooth and grey over pinkish-brown or coppery coloured new bark. The leaves on young plants and on coppice regrowth are arranged alternately, linear, 70–105 mm (2.8–4.1 in) long, 4–7 mm (0.16–0.28 in) wide and have a petiole. Adult leaves are linear to narrow lance-shaped, 60–100 mm (2.4–3.9 in) long, 5–10 mm (0.20–0.39 in) wide and the same glossy green on both sides. The flower buds are arranged in groups of seven in leaf axils on a peduncle 2–8 mm (0.079–0.31 in) long, the individual buds on a pedicel 2–3 mm (0.079–0.12 in) long. Mature buds are oval, 4–8 mm (0.16–0.31 in) long, 2.5–5 mm (0.098–0.20 in) wide with a rounded or conical operculum. Flowering occurs between August and November and the flowers are creamy white. The fruit are cup shaped to conical, 4–6 mm (0.16–0.24 in) long and wide with a thin rim and the valves enclosed or level with the rim. [4] [5] [6]

Taxonomy and naming

Eucalyptus balxellii was first formally described in 1992 by Ken Hill and Lawrie Johnson from a specimen collected in 1978 at Howatharra Gap north of Geraldton by Donald Blaxell. The description was published in the journal Telopea . [7] The specific epithet (blaxellii) honours the collector of the type specimen who discovered the species. [5]

Distribution and habitat

The Howatharra mallee is found on rocky hillsides and creek flats in the Wheatbelt near Morawa and in the Mid West region between Northampton and Geraldton in the Moresby Range where it grows in sandy-clay soils. [6] It is an emergent in heath and occurs with Eucalyptus loxophleba , Eucalyptus stowardii , Allocasuarina campestris , Melaleuca megacephala , Gastrolobium spinosum and various species of Acacia . [8]

Conservation

This mallee eucalypt is classified as "Priority Four" by the Government of Western Australia Department of Parks and Wildlife, [6] meaning that is rare or near threatened. [9]

See also

Related Research Articles

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

Eucalyptus drummondii, commonly known as Drummond's gum or Drummond's mallee, is a species of mallee or tree that is endemic to the southwest of Western Australia. It has smooth bark, narrow elliptical to egg-shaped adult leaves, flower buds in groups of seven, white flowers and hemispherical fruit.

<i>Eucalyptus comitae-vallis</i> Species of eucalyptus

Eucalyptus comitae-vallis, commonly known as Comet Vale mallee, is a mallee that is endemic to the south-west of Western Australia. It has rough, flaky to ribbony bark on the trunk and larger branches, smooth withish bark above, linear to narrow lance-shaped adult leaves, flower buds in groups of seven to eleven, white flowers and barrel-shaped, conical or cup-shaped 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 latens</i> Species of eucalyptus

Eucalyptus latens, commonly known as narrow-leaved red mallee, is a species of mallee that is endemic to the south-west of Western Australia. It has smooth grey and coppery bark, linear to narrow lance-shaped adult leaves, flower buds in groups of seven to eleven or more, creamy white flowers and small barrel-shaped to shortened spherical fruit.

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

Eucalyptus leptocalyx, commonly known as Hopetoun mallee, is a species of mallee that is endemic to an area along the south coast of Western Australia. It has smooth bark, lance-shaped adult leaves, flower buds in groups of between nine and fifteen, creamy white flowers and barrel-shaped to cylindrical fruit.

Eucalyptus limitaris is a species of tree or mallee that is endemic to north-west Australia. It has rough, flaky or fibrous bark on the trunk and branches, lance-shaped to curved adult leaves, flower buds in groups of seven on a branching peduncle and conical to barrel-shaped or cup-shaped fruit.

Eucalyptus misella is a species of mallee that is endemic to a small area of Western Australia. It has smooth, greyish bark, narrow oblong to narrow elliptical leaves, flower buds in groups of between seven and eleven, white flowers and flattened spherical fruit.

Eucalyptus olivina is a species of mallee or a tree that is endemic to Western Australia. It has smooth greyish bark, linear to narrow lance-shaped adult leaves, flower buds in groups of seven or nine, creamy white flowers and short barrel-shaped to cup-shaped fruit.

Eucalyptus quaerenda is a species of mallee that is endemic to the southwest of Western Australia. It is an often rounded mallee with foliage reaching the ground and has smooth bark, linear adult leaves, flower buds in groups of seven, creamy white flowers and shallow, cup-shaped to flattened spherical fruit.

Eucalyptus ravida is a species of small mallet that is endemic to Western Australia. It has smooth, shiny bark, lance-shaped adult leaves, flower buds in groups of seven, white flowers and conical to hemispherical fruit.

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

Eucalyptus rigidula, commonly known as stiff-leaved mallee, is a species of mallee that is endemic to Western Australia. It has smooth bark, linear to narrow elliptic or narrow lance-shaped leaves, flower buds in groups of nine or eleven, creamy white flowers and barrel-shaped to hemispherical fruit.

Eucalyptus rosacea is a species of mallee that is endemic to Western Australia. It has smooth, greyish bark, linear to narrow oblong adult leaves, flower buds in groups of seven, pink, red or cream-coloured flowers and flattened hemispherical to almost saucer-shaped fruit.

Eucalyptus semota, commonly known as marymia mallee, is a species of mallee or small tree that is endemic to a small area in central Western Australia. It has rough, flaky to fibrous bark on the trunk, smooth grey or brown bark above, linear to narrow lance-shaped leaves, flower buds in groups of seven or nine, white flowers and conical to cup-shaped fruit.

Eucalyptus ultima is a species of mallee that is endemic to a small area in the Gascoyne region of Western Australia. It has smooth bark, linear to narrow lance-shaped leaves, flower buds in groups of nine to fifteen, white flowers and spherical to cup-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.

Eucalyptus foliosa is a species of mallee that is endemic to Western Australia. It has a dense crown with foliage reaching to the ground, smooth greyish bark, linear to narrow lance-shaped or narrow oblong adult leaves, flower buds in groups of seven or nine, white flowers and conical to shortened hemispherical fruit. It is only known from a small area near Esperance.

Eucalyptus tephrodes is a species of small tree or mallee that is endemic to Western Australia. It has rough bark on the trunk and larger branches, smooth bark above, egg-shaped to lance-shaped adult leaves, flower buds in groups of three on the ends of branchlets and cup-shaped to hemispherical fruit.

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

Eucalyptus terebra, commonly known as Balladonia gimlet, is a species of gimlet that is endemic to Western Australia. It has satiny or glossy bark on its fluted trunk, linear to narrow lance-shaped adult leaves, flower buds in groups of seven, yellowish flowers and conical to hemispherical fruit. It is one of the seven species of gimlet.

Eucalyptus orthostemon is a species of mallee that is endemic to the south-west of Western Australia. It has smooth coppery and greyish bark, linear adult leaves, oval to spindle-shaped buds in groups of seven, creamy white flowers and conical to cup-shaped fruit.

<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. ↑ Fensham, R., Laffineur, B. & Collingwood, T. 2019. Eucalyptus blaxellii. The IUCN Red List of Threatened Species 2019: e.T133378171A133378176. https://dx.doi.org/10.2305/IUCN.UK.2019-3.RLTS.T133378171A133378176.en. Downloaded on 20 September 2021.
  2. ↑ "Eucalyptus blaxellii". Australian Plant Census. Retrieved 19 March 2019.
  3. ↑ "Eucalyptus blaxellii — Howatharra Mallee". Species Profile and Threats Database. Department of the Environment . Retrieved 8 May 2017.
  4. ↑ "Eucalyptus blaxellii". Euclid: Centre for Australian National Biodiversity Research. Retrieved 19 March 2019.
  5. 1 2 Hill, Ken; Johnson, Lawrence A.S. (1992). "Systematic studies in the eucalypts. 5. New taxa and combinations in Eucalyptus (Myrtaceae) in Western Australia". Telopea. 4 (4): 564–565. doi: 10.7751/telopea19814948 .
  6. 1 2 3 "Eucalyptus blaxellii". FloraBase . Western Australian Government Department of Parks and Wildlife.
  7. ↑ "Eucalyptus blaxellii". APNI. Retrieved 19 March 2019.
  8. ↑ "Advice to the Minister for Environment Protection, Heritage and the Arts from the Threatened Species Scientific Committee (the Committee) on Amendment to the list of Threatened Species" (PDF). Department of Environment. 19 August 2010. Retrieved 8 May 2017.
  9. ↑ "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 19 March 2019.
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