Eucalyptus uncinata

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Hook-leaved mallee
Eucalyptus uncinata.jpg
Eucalyptus uncinata near Esperance
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Eucalyptus
Species:
E. uncinata
Binomial name
Eucalyptus uncinata
Synonyms [1]
  • Eucalyptus desertorum Naudin
  • Eucalyptus dumosa var. puncticulata Benth.
  • Eucalyptus puncticulata(Benth.) Blakely
  • Eucalyptus uncinata var. latifoliaBenth.
  • Eucalyptus uncinataTurcz. var. uncinata
flower buds and flowers Eucalyptus uncinata buds.jpg
flower buds and flowers
fruit Eucalyptus uncinata - Flickr - Kevin Thiele.jpg
fruit
E. uncinta from Eucalyptographia Eucalyptus uncinata from "Eucalyptographia. A descriptive atlas of the eucalypts of Australia and the adjoining islands"; (1879) (20165942804).jpg
E. uncinta from Eucalyptographia

Eucalyptus uncinata, commonly known as the hook-leaved mallee, [2] is a species of mallee that is endemic to the southwest of Western Australia. It has smooth bark, lance-shaped adult leaves, flower buds arranged in groups of nine to thirteen, creamy white flowers and barrel-shaped to oval or cylindrical fruit.

Contents

Description

Eucalyptus uncinata is a mallee that typically grows to a height of 1–8 m (3 ft 3 in – 26 ft 3 in) and forms a lignotuber. It has smooth grey to light brown bark that is shed in short, curly strips, and sometimes a short stocking of fibrous bark near the base. Young plants and coppice regrowth have leaves in opposite pairs joined at their bases, each half-leaf egg-shaped to round, 17–55 mm (0.67–2.17 in) long and wide. Adult leaves are the same shade of glossy green on both sides, narrow lance-shaped to lance-shaped, 65–115 mm (2.6–4.5 in) long and 10–25 mm (0.39–0.98 in) wide, tapering to a petiole 7–25 mm (0.28–0.98 in) long. The flower buds are arranged in leaf axils in groups of nine, eleven or thirteen on a flattened, unbranched peduncle 3–20 mm (0.12–0.79 in) long, the individual buds sessile or on pedicels up to 2 mm (0.079 in) long. Mature buds are oval to spindle-shaped, 7–15 mm (0.28–0.59 in) and 3–5 mm (0.12–0.20 in) wide with a conical or rounded operculum about the same length as the floral cup. Flowering occurs between January and April and the flowers are creamy white. The fruit is a woody barrel-shaped, oval or cylindrical capsule 5–9 mm (0.20–0.35 in) and 4–8 mm (0.16–0.31 in) wide with the valves below rim level. [2] [3] [4]

Taxonomy

Eucalyptus uncinata was first formally described by the botanist Nikolai Turczaninow in 1849 in the journal Bulletin de la Société Impériale des Naturalistes de Moscou from specimens collected by James Drummond. [5] [6] The specific epithet (uncinata) is from the Latin word uncinatus meaning "barbed" or "hooked", referring to the fine tip of the leaves. [3]

Distribution and habitat

Hook-leaved mallee is found on coastal and sub-coastal sand plains and low hills between York, the Stirling Range, Salmon Gums and Israelite Bay, growing mostly in open shrubland. [2] [3] [4]

The species is associated with the western mallee subgroup which is characterised by several eucalypts including Eucalyptus oleosa , Eucalyptus moderata , Eucalyptus incrassata , Eucalyptus foecunda , Eucalyptus redunca and Eucalyptus eremophila . The understorey is predominantly shrubby with species of Melaleuca and Acacia along with the occasional Triodia . [7]

Conservation status

This eucalypt is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife. [2]

See also

Related Research Articles

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References

  1. 1 2 "Eucalyptus uncinata". Australian Plant Census. Retrieved 13 January 2020.
  2. 1 2 3 4 "Eucalyptus uncinata". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  3. 1 2 3 "Eucalyptus uncinata". Euclid: Centre for Australian National Biodiversity Research. Retrieved 28 May 2020.
  4. 1 2 Chippendale, George M. "Eucalyptus uncinata". Australian Biological Resources Study, Department of the Environment and Energy, Canberra. Retrieved 13 January 2020.
  5. "Eucalyptus uncinata". APNI. Retrieved 13 January 2020.
  6. Turczaninow, Nikolai (1849). "Decas sexta generum plantarum hucusque non descriptorum adjectis descriptionibus specierum nonnullarum". Bulletin de la Société Impériale des Naturalistes de Moscou. 22 (3): 23. Retrieved 13 January 2020.
  7. "Open mallee woodlands and sparse mallee woodlands" (PDF). Commonwealth of Australia . Retrieved 6 May 2017.