Eucalyptus sheathiana

Eucalyptus sheathiana, commonly known as ribbon-barked gum,[2] is a species of tree or a mallee that is endemic to Western Australia. It has smooth bark that is shed in long ribbons, lance-shaped adult leaves, flower buds in groups of seven, creamy white flowers and conical to cup-shaped fruit.

Ribbon-barked gum
Eucalyptus sheathiana in Helms Arboretum, near Esperance
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Eucalyptus
Species:
E. sheathiana
Binomial name
Eucalyptus sheathiana
flower buds and flowers
fruit

Description

Eucalyptus sheathiana is a tree or a mallee, that typically grows to a height of 3–15 m (9.8–49.2 ft) and forms a lignotuber. It has smooth, greyish bark that is shed in long ribbons. Young plants and coppice regrowth have greyish green, egg-shaped to lance-shaped leaves that are 75–125 mm (3.0–4.9 in) long and 25–40 mm (0.98–1.57 in) wide. Adult leaves are lance-shaped, 75–135 mm (3.0–5.3 in) long and 8–18 mm (0.31–0.71 in) wide, tapering to a petiole 10–28 mm (0.39–1.10 in) long. The flower buds are arranged in leaf axils on an unbranched peduncle 5–20 mm (0.20–0.79 in) long, the individual buds on pedicels 3–7 mm (0.12–0.28 in) long. Mature buds are oval to pear-shaped, 6–12 mm (0.24–0.47 in) long and 4–7 mm (0.16–0.28 in) wide with a conical operculum. Flowering occurs from January to April and the flowers are creamy white. The fruit is a woody conical to cup-shaped capsule 5–10 mm (0.20–0.39 in) long and 5–8 mm (0.20–0.31 in) wide with the valves near rim level.[2][3][4]

Taxonomy and naming

Eucalyptus sheathiana was first formally described in 1916 by Joseph Maiden from material collected in Kings Park by Jeremiah Sheath (1850–1915), in turn, from seed collected from the "Eastern Gold Fields near the South Australian border".[5][6][7] The specific epithet (sheathiana) honour the collector of the type specimens.[2]

Distribution and habitat

This eucalypt is found on plains in the southern wheatbelt between Wongan Hills, Nyabing and Lake King, and in nearby parts of the Goldfields-Esperance region. It grows in shrubland on sandy lateritic soils.[2][3][4]

Conservation status

This eucalypt is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife.[3]

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See also

References
  1. "Eucalyptus sheathiana". Australian Plant Census. Retrieved 22 December 2019.
  2. "Eucalyptus sheathiana". Euclid: Centre for Australian National Biodiversity Research. Retrieved 29 May 2020.
  3. "Eucalyptus sheathiana". FloraBase. Western Australian Government Department of Parks and Wildlife.
  4. Chippendale, George M. "Eucalyptus sheathiana". Australian Biological Resources Study, Department of the Environment and Energy, Canberra. Retrieved 22 December 2019.
  5. "Eucalyptus sheathiana". APNI. Retrieved 22 December 2019.
  6. Maiden, Joseph (1916). "Notes on Eucalyptus, (with description of new species) No. IV". Journal and Prodeedings of the Royal Society of New South Wales. 49 (3): 312–316. Retrieved 22 December 2019.
  7. "Sheath, Jeremiah (1850-1915)". JSTOR. Retrieved 22 December 2019.
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