Eucalyptus dwyeri

Eucalyptus dwyeri, commonly known as Dwyer's red gum or Dwyer's mallee gum,[2] is a species of small tree, sometimes a mallee that is endemic to eastern Australia. It has smooth, white or cream-coloured bark, lance-shaped to curved adult leaves, flower buds in groups of seven and conical, bell-shaped or hemispherical fruit.

flower buds
fruit

Dwyer's red gum
Eucalyptus dwyeri near Condobolin
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Eucalyptus
Species:
E. dwyeri
Binomial name
Eucalyptus dwyeri

Description

Eucalyptus dwyeri is a tree that typically grows to a height of 10–15 m (33–49 ft) or a mallee to 6 m (20 ft), and forms a lignotuber. It has smooth white to cream coloured or greyish brown bark that is shed in plates or flakes. Young plants and coppice regrowth have lance-shaped leaves that are 50–150 mm (2.0–5.9 in) long and 10–25 mm (0.39–0.98 in) wide. Adult leaves are lance-shaped to curved, 70–150 mm (2.8–5.9 in) long and 10–27 mm (0.39–1.06 in) wide on a petiole 10–22 mm (0.39–0.87 in) long. The flower buds are arranged in groups of seven in leaf axils on an unbranched peduncle 3–10 mm (0.12–0.39 in) long, the individual buds sessile or on a pedicel up to 5 mm (0.20 in) long. Mature buds are oval to diamond-shaped, 6–13 mm (0.24–0.51 in) long and 3–6 mm (0.12–0.24 in) wide with a conical operculum. Flowering occurs from September to December and the flowers are white. The fruit is a woody conical, bell-shaped or hemispherical capsule 3–9 mm (0.12–0.35 in) long and 5–7 mm (0.20–0.28 in) wide with the valves at rim level or slightly beyond.[2][3][4]

Taxonomy and naming

Eucalyptus dwyeri was first described in 1925 by Joseph Maiden and William Blakely from a specimen collected at Gungal near Merriwa by John Boorman and the description was published in Journal and Proceedings of the Royal Society of New South Wales.[5][6][7] The specific epithet (dwyeri) honours "James Wilfred Dwyer, Roman Catholic Bishop of Wagga, N.S.W., who, when Parish Priest of Temora, collected this species on several occasions, and who has been an acute observer of native plants for many years."[2][6]

Distribution and habitat

Dwyer's red gum grows in mallee shrubland in shallow soils on ridges west of the Great Dividing Range in New South Wales and southern Queensland. It has also been recorded from northern Victoria but the Royal Botanic Gardens Victoria suggests that these records are better referred to E. blakelyi.[3][4][8]

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References
  1. "Eucalyptus dwyeri". Australian Plant Census. Retrieved 26 June 2019.
  2. "Eucalyptus dwyeri". Euclid: Centre for Australian National Biodiversity Research. Retrieved 4 June 2020.
  3. Chippendale, George M. "Eucalyptus dwyeri". Australian Biological Resources Study, Department of the Environment and Energy, Canberra. Retrieved 26 June 2019.
  4. Hill, Ken. "Eucalyptus dwyeri". Royal Botanic Garden Sydney. Retrieved 26 June 2019.
  5. "Eucalyptus dwyeri". APNI. Retrieved 26 June 2019.
  6. Maiden, Joseph H.; Blakely, William F. (1925). "Descriptions of sixteen new species of Eucalyptus". Journal and Proceedings of the Royal Society of New South Wales. 59: 160–165. Retrieved 26 June 2019.
  7. "Boorman, John L. (1864 - 1938)". Council of Heads of Australasian Herbaria. Retrieved 26 June 2019.
  8. "Eucalyptus sp. aff. blakelyi (Strathbogie & Warby Ranges)". Royal Botanic Gardens Victoria. Retrieved 26 June 2019.
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