Eucalyptus hawkeri

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Eucalyptus hawkeri
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. hawkeri
Binomial name
Eucalyptus hawkeri

Eucalyptus hawkeri is a species of mallee or slender tree that is endemic to Victoria, Australia. It has rough, flaky or fibrous bark on the lower trunk, smooth bark above, lance-shaped or curved adult leaves, flower buds in groups of between seven and eleven, white flowers and cylindrical or barrel-shaped fruit.

Contents

Description

Eucalyptus hawkerii is a mallee or slender tree that typically grows to a height of 15 m (49 ft). It has rough, scaly or fibrous bark on the lower half of its trunk, smooth light grey to brownish bark above. Young plants have lance-shaped to narrow elliptical leaves that are dull bluish green, slightly paler on the lower side, 60–120 mm (2.4–4.7 in) long and 6–12 mm (0.24–0.47 in) wide on a petiole 6–12 mm (0.24–0.47 in) long. Adult leves are lance-shaped, sometimes curved, 70–120 mm (2.8–4.7 in) long and 8–17 mm (0.31–0.67 in) wide on a petiole 10–16 mm (0.39–0.63 in) long. The flower buds are arranged in leaf axils in groups of seven, nine or eleven on an unbranched peduncle 7–11 mm (0.28–0.43 in) long, the individual buds on pedicels 4–8 mm (0.16–0.31 in) long. Mature buds are oval to spindle-shaped, 6–7 mm (0.24–0.28 in) long and 3–4 mm (0.12–0.16 in) wide with a conical operculum about half as long as the floral cup. Flowering occurs in autumn and the flowers are white. The fruit is a woody, more or less cylindrical or barrel-shaped capsule 6–7 mm (0.24–0.28 in) long and 3–4 mm (0.12–0.16 in) wide with the valves below rim level. [3] [4]

Taxonomy and naming

Eucalyptus hawkeri was first formally described in 2004 by Kevin Rule from a specimen collected on Mount Arapiles and the description was published in the journal Muelleria . [5] The specific epithet honours the park ranger, Peter Hawker, for his contribution to the understanding of this species. [4]

Distribution and habitat

This mallee is only known from the Mt. Arapiles area and nearby reserves where it grows in remnant woodland. [3] [4]

The total population of the species is estimated at around 1,300 individuals spread over 10 main sub-populations. The population is thought to currently be stable although it is severely fragmented. The International Union for the Conservation of Nature listed it as a vulnerable species in 2019. [1]

See also

Related Research Articles

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Eucalyptus arenicola, commonly known as the Holey Plains peppermint or Gippsland Lakes peppermint, is a tree or mallee that is endemic to south-east coastal areas of Victoria. It has rough, fibrous bark on its trunk and branches, glossy green, lance-shaped adult leaves, club-shaped buds arranged in groups of eleven to twenty five, white flowers and cup-shaped to hemispherical fruit.

Eucalyptus carolaniae is a species of small to medium-sized tree that is endemic to a small area of Victoria. It has thick, rough, fibrous bark on the trunk grading to thin finely furrowed bark on the branches. It has glossy green, lance-shaped adult leaves, flower buds in groups of seven, white flowers and cylindrical to oval fruit.

Eucalyptus infracorticata is a species of mallee that is endemic to a small area of Western Australia. It has rough, flaky or fibrous bark on the lower part of the trunk, broad lance-shaped adult leaves, flower buds in groups of between seven and eleven and short cylindrical fruit.

References

  1. 1 2 Fensham, R.; Laffineur, B.; Collingwood, T (4 March 2019). "Eucalyptus hawkeri". IUCN Red List of Threatened Species . 2019: e.T137620006A137620016. doi: 10.2305/IUCN.UK.2019-3.RLTS.T137620006A137620016.en . Retrieved 21 June 2023.
  2. "Eucalyptus hawkeri". Australian Plant Census. Retrieved 25 July 2019.
  3. 1 2 Messina, Andre; Stajsic, Val. "Eucalyptus hawkeri". Royal Botanic Gardens Victoria. Retrieved 25 July 2019.
  4. 1 2 3 Rule, Kevin James (2004). "Eucalyptus hawkeri" (PDF). Muelleria. 20: 17–22. Archived from the original (PDF) on 6 April 2020. Retrieved 25 July 2019.
  5. "Eucalyptus hawkeri". APNI. Retrieved 25 June 2019.