Eucalyptus mcquoidii

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Quoin Head marlock
EucalyptusMcquoidii PerthBG-20171218-2b.jpg
Bark of Eucalyptus mcquoidii
Status DECF P2.svg
Priority Two — Poorly Known Taxa (DEC)
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Eucalyptus
Species:
E. mcquoidii
Binomial name
Eucalyptus mcquoidii

Eucalyptus mcquoidii, commonly known as the Quoin Head marlock, [2] is a species of marlock, mallee or small tree that is endemic to a restricted area in Western Australia. It has smooth, greyish bark, glossy green, linear to narrow oblong adult leaves, flower buds in clusters of up to fifty that are fused at their bases, greenish flowers and fruit in spherical masses.

Contents

fruit cluster Eucalyptus mcquoidii fruit.jpg
fruit cluster

Description

Eucalyptus mcquoidii is a single-stemmed, shrub-like marlock or stunted mallee that typically grows to a height of 0.5–3 m (1 ft 8 in–9 ft 10 in) or a tree to 10 m (33 ft), but does not form a lignotuber. It has smooth pale grey and whitish bark. Adult leaves are linear to narrow oblong, the same shade of glossy green on both sides, 45–80 mm (1.8–3.1 in) long and 5–10 mm (0.20–0.39 in) wide, tapering to a petiole 2–8 mm (0.079–0.315 in) long. The flower buds are arranged in leaf axils in clusters of between about twenty and fifty, the buds joined at the base on a cylindrical peduncle 30–50 mm (1.2–2.0 in) long. The individual buds are about 4–5 mm (0.16–0.20 in) wide, each with a narrow, more or less straight operculum 43–60 mm (1.7–2.4 in) long. Flowering has been recorded in April, October and November and the flowers are greenish yellow. The fruit form a spherical mass, each fruit 6–10 mm (0.24–0.39 in) with three valves that remain joined at the tip. [2] [3] [4]

Taxonomy and naming

Eucalyptus mcquoidii was first formally described in 2002 by Ian Brooker and Stephen Hopper from a specimen collected by Brooker near Quoin Head in the Fitzgerald River National Park. The description was published in the journal Nuytsia . [4] [5] The specific epithet (mcquoidii) honours Nathan McQuoid, former Fitzgerald River National Park head ranger, for his assistance to the authors.

Eucalyptus mcquoidii belongs in Eucalyptus subgenus Symphyomyrtus, section Bisectae, subsection Hadrotes because of its coarsely bisected cotyledons, erect stamens and larger, thick-rimmed fruits. The subsection Hadrotes contains ten species of which eight do not have oil glands in the branchlet pith. Together these eight species form series Lehmannianae, a group that has fruit with exserted valves that have fused tips even after the seeds are lost, a feature also shared with the distantly related Eucalyptus cornuta . [6]

Of the eight species in series Lehmannianae, four species (E. mcquoidii, E. conferruminata , E. lehmannii and E. arborella ) have the buds in each axillary cluster, fused basally. [6]

Distribution and habitat

The Quoin Head marlock is found on coastal slopes, creeklines and cliff tops where it is only known from a small area at the type location near Quoin Head . [2]

Conservation status

This eucalypt is classified as "Priority Two" by the Western Australian Government Department of Parks and Wildlife [3] meaning that it is poorly known and from only one or a few locations. [7]

See also

Related Research Articles

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

Eucalyptus conferruminata, commonly known as Bald Island marlock or bushy yate, is a small tree or mallee endemic to the south coast of Western Australia. It has smooth whitish and grey bark, elliptic to oblong or egg-shaped adult leaves, flower buds in fused in groups of between fifteen and twenty one, green to yellowish flowers and fruit forming a woody mass.

A marlock or moort is a shrubby or small-tree form of Eucalyptus found in Western Australia. Unlike the mallee, it is single-stemmed and lacks a lignotuber. It has a dense canopy of leaves which often extends to near ground level.

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

Eucalyptus lehmannii, commonly known as bushy yate, is a eucalypt in the myrtle family Myrtaceae endemic to the south-west of Western Australia. It is a small tree with an oval, spreading form and dense foliage which sometimes reaches to the ground. It is widely cultivated in Australia and the United States because of its ornamental shape and decorative flowers, buds and fruit. There has been some confusion about its classification because of its ability to hybridise.

Eucalyptus arborella, commonly known as Twertup mallet, is a mallet or small tree that is endemic to a small area in the south-west of Western Australia. It has smooth greyish bark, narrow lance-shaped adult leaves, flower buds in groups of thirteen to twenty fused together, yellowish green flowers, and fruits fused together in a woody mass.

<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.

Eucalyptus exigua is a species of mallee that is endemic to Western Australia. It has smooth, whitish bark, linear to narrow lance-shaped adult leaves, flower buds in groups of between seven and eleven, white flowers and short barrel-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.

Eucalyptus litorea, commonly known as saline mallee, is a species of mallee that is endemic to a small area on the southern coast of Western Australia. It has hard, rough grey bark on the trunk, smooth grey bark above, lance-shaped adult leaves, flower buds in groups of seven, white flowers and cylindrical or barrel-shaped fruit.

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

Eucalyptus luteola is a species of mallee that is endemic to a small area of Western Australia. It has smooth grey bark with rough greyish ribbons near the base, linear to narrow lance-shaped adult leaves, flower buds in groups of eleven to thirteen, lemon-coloured flowers and cylindrical to barrel-shaped fruit.

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

Eucalyptus petrensis, commonly known as limestone mallee, straggly mallee or koodjat, is a species of straggly mallee that is endemic to Western Australia. It has mostly smooth bark, lance-shaped adult leaves, flower buds in groups of between seven and thirteen, creamy white flowers and more or less spherical fruit.

Eucalyptus quadrans is a species of mallee or a small tree that is endemic to the southwest of Western Australia. It has smooth, greyish bark, narrow lance-shaped adult leaves, flower buds in groups of seven, white flowers and cup-shaped fruit that are square in cross-section.

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.

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

Eucalyptus talyuberlup, commonly known as Stirling Range yate, is a species of small tree or a mallee that is endemic to a small area of the Great Southern region of Western Australia. It has smooth bark, glossy green, narrow lance-shaped adult leaves, flower buds in groups of seven to thirteen, yellowish green flowers and bell-shaped 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.

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

Eucalyptus celastroides, commonly known by the Noongar name of mirret, is a species of eucalypt that is endemic to the south-west of Western Australia. It is a mallee, rarely a tree, and has rough bark on about half of the lower half of its tunk, smooth above, narrow lance-shaped adult leaves, flower buds in groups of seven or nine, white flowers and urn-shaped 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 discreta</i> Species of eucalyptus

Eucalyptus discreta is a species of shrub or mallee that is endemic to Western Australia. It has smooth creamy brown and pale grey bark, narrow-lance-shaped adult leaves, flower buds in groups of seven or nine, creamy-white flowers and barrel-shaped fruit.

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

Eucalyptus dissimulata, commonly known as the red-capped mallee, is a species of mallee that is endemic to Western Australia. It has smooth greyish bark that is shed in strips, glossy green, narrow elliptic to narrow lance-shaped adult leaves, flower buds in groups of between seven and eleven, creamy white flowers and short cylindrical to stubby barrel-shaped fruit.

Eucalyptus sinuosa, commonly known as octopus mallee, is a species of mallee that is endemic to Western Australia. It has smooth bark, linear leaves, flower buds fused together in clusters of between eleven and twenty-five, greenish yellow flowers and fruit that are fused into a woody mass.

Eucalyptus retusa, commonly known as the Point Hood yate, is a species of mallee that is endemic to a restricted area in Western Australia. It has smooth, greyish bark, glossy green, egg-shaped to spatula-shaped adult leaves, flower buds in clusters of between thirteen and nineteen, yellowish green flowers and fruit with their bases fused together.

References

  1. "Eucalyptus mcquoidii". Australian Plant Census. Retrieved 26 September 2019.
  2. 1 2 3 "Eucalyptus mcquoidii". Euclid: Centre for Australian National Biodiversity Research. Retrieved 1 June 2020.
  3. 1 2 "Eucalyptus mcquoidii". FloraBase . Western Australian Government Department of Parks and Wildlife.
  4. 1 2 Brooker, M. Ian H.; Hopper, Stephen (2002). "Taxonomy of species deriving from the publication of Eucalyptus subseries Cornutae Benth. (Myrtaceae)". Nuytsia. 14 (3): 336. Retrieved 26 September 2019.
  5. "Eucalyptus mcquoidii". APNI. Retrieved 27 September 2019.
  6. 1 2 "Eucalyptus lehmannii". Euclid. CSIRO . Retrieved 23 December 2017.
  7. "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 27 September 2019.