Eucalyptus sweedmaniana

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Sweedman's sprawling mallee
Eucalyptus sweedmaniana.jpg
Eucalyptus sweedmaniana at Kings Park
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. sweedmaniana
Binomial name
Eucalyptus sweedmaniana

Eucalyptus sweedmaniana is a sprawling to prostrate mallee that is endemic to a small area in the Cape Arid National Park in Western Australia. It has smooth, silvery grey bark, broadly lance-shaped, glossy green adult leaves, single red, pendulous flower buds in leaf axils, pink flowers and prominently winged fruit.

Contents

Description

Eucalyptus sweedmaniana is a sprawling or prostrate mallee that grows to a height of about 1 m (3 ft 3 in), a width of 5 m (16 ft) and forms a lignotuber. It has smooth, shiny silvery grey bark that fades to dull grey. Young plants have reddish green, lance-shaped to elliptical leaves that are 42–63 mm (1.7–2.5 in) long and 19–25 mm (0.75–0.98 in) wide on a petiole 8–15 mm (0.31–0.59 in) long. Adult leaves are the same shade of glossy green on both sides, broadly lance-shaped, 165–263 mm (6.5–10.4 in) long and 45–67 mm (1.8–2.6 in) wide on thick, flattened petiole 38–48 mm (1.5–1.9 in) long. The flower buds are arranged singly in leaf axils on a down-curved, winged peduncle. The mature flower buds are red, square in cross section with prominent wings, with a red, pyramid-shaped operculum. Flowering has been observed from November to February and the flowers are pink. The fruit is a woody, cube-shaped to oblong capsule that is square in cross-section, 34–38 mm (1.3–1.5 in) long and 30–41 mm (1.2–1.6 in) wide with prominent wings and the valves enclosed below the rim. [2] [3]

Taxonomy

Eucalyptus sweedmaniana was first formally described in 2009 by Stephen Hopper and Nathan K. McQuoid and the description was published in Australian Systematic Botany from a specimen in the Cape Arid National Park in 2006. [2] [4] The specific epithet (sweedmaniana) honours Luke Sweedman, the curator of the Western Australian Seed Technology Centre, Western Australian Botanic Garden, Kings Park and Botanic Garden. [2]

Distribution

This mallee is only known from the lower coastal slopes of Mount Arid where it is exposed to significant salt spray. [2] [5]

Conservation

Eucalyptus sweedmaniana is classified as "Priority Two" by the Western Australian Government Department of Parks and Wildlife [5] meaning that it is poorly known and from only one or a few locations. [6]

See also

Related Research Articles

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

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

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

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

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

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

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Eucalyptus varia is a species of mallee that is endemic to an area near the south coast of Western Australia. It has smooth bark, narrow lance-shaped adult leaves, flower buds in groups of nine or eleven, yellow flowers and barrel-shaped to cylindrical fruit.

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

Eucalyptus aequioperta, commonly known as the Welcome Hill gum, is a mallee, sometimes a tree and is endemic to Western Australia. It has rough bark on the lower half of the trunk, lance-shaped leaves, flower buds in groups of between seven and fifteen, white flowers and more or less cup-shaped fruit.

Eucalyptus brandiana is a mallet that is endemic to a small area in the Fitzgerald River National Park in Western Australia. It has smooth, shiny silvery bark, oblong to lance-shaped, glossy green adult leaves, single red flower buds in leaf axils, pink flowers and prominently winged fruit.

Eucalyptus × missilis, commonly known as bullet bush, is a species of mallee that is endemic to a small area on the south coast of Western Australia. It has smooth bark, egg-shaped to lance-shaped adult leaves, flower buds in groups of between seven and fifteen, pale yellow flowers and cup-shaped to cylindrical fruit. It is thought to be a hybrid between E. cornuta and E. angulosa that occur in the same area.

References

  1. ↑ "Eucalyptus sweedmaniana". Australian Plant Census. Retrieved 4 January 2020.
  2. 1 2 3 4 Hopper, Stephen D.; McQuoid, Nathan K. (2009). "Two new rare species and a new hybrid in Eucalyptus series Tetrapterae (Myrtaceae) from southern coastal Western Australia". Australian Systematic Botany. 22 (3): 185–187. doi:10.1071/SB06034.
  3. ↑ "Eucalyptus sweedmaniana". Centre for Australian National Biodiversity Research. Retrieved 29 May 2020.
  4. ↑ "Eucalyptus sweedmaniana". APNI. Retrieved 4 January 2020.
  5. 1 2 "Eucalyptus sweedmaniana". FloraBase . Western Australian Government Department of Parks and Wildlife.
  6. ↑ "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 4 January 2020.
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