Eucalyptus urna

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Merrit
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Eucalyptus
Species:
E. urna
Binomial name
Eucalyptus urna

Eucalyptus urna, commonly known as merrit, [2] is a species of mallet or marlock that is endemic to southern areas of Western Australia. It has smooth bark, lance-shaped adult leaves, flower buds in groups of seven to thirteen, creamy yellow to white flowers and urn-shaped fruit.

Contents

Description

Eucalyptus urna is a mallet or marlock that typically grows to a height of 16 m (52 ft) but does not form a lignotuber. It has smooth grey to white, often glossy silvery bark. Young plants have stems that are square in cross-section with a prominent wing on each corner, and sessile, egg-shaped leaves that are bluish green, 20–95 mm (0.79–3.74 in) long and 13–40 mm (0.51–1.57 in) wide and arranged in opposite pairs. The flower buds are arranged in leaf axils on an unbranched peduncle 10–17 mm (0.39–0.67 in) long, the individual buds on pedicels 4–8 mm (0.16–0.31 in) long. Mature buds are 15–24 mm (0.59–0.94 in) long and 4–9 mm (0.16–0.35 in) wide with an urn-shaped floral cup and a beaked to horn-shaped operculum 9–16 mm (0.35–0.63 in) long. Flowering has been recorded in most months and the flowers are creamy yellow to white. The fruit is a woody, urn-shaped capsule 7–12 mm (0.28–0.47 in) long and 5–10 mm (0.20–0.39 in) wide with the valves protruding prominently but fragile. [2] [3] [4]

Taxonomy and naming

Eucalyptus urna was first formally described in 1999 by Dean Nicolle in Australian Systematic Botany from specimens collected by Ian Brooker near Newdegate in 1988. [5] The specific epithet (urna) is a Latin word meaning water jar or urn, referring to the shape of the fruit. [2]

Distribution and habitat

This mallet is widespread and often locally abundant east and south-east of Perth and east of Lake Grace to Caiguna. It grows on flats in open woodland, often with an understorey of Melaleuca species. [2] [3] [4]

Conservation status

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

See also

Related Research Articles

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<i>Corymbia dichromophloia</i> Species of plant

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Eucalyptus creta, commonly known as the large-fruited gimlet, is a species of mallet or tree that is endemic to Western Australia. It has smooth, shiny bark, lance-shaped adult leaves, flower buds in groups of three in leaf axils, relatively large white to creamy yellow flowers, and broadly hemispherical to bell-shaped fruit.

Eucalyptus delicata is a species of tree that is endemic to Western Australia. It has rough, fibrous to scaly bark on the trunk, smooth white to greyish bark above, linear to narrow lance-shaped adult leaves, flower buds in groups of between seven and eleven, creamy white flowers and more or less spherical to barrel-shaped fruit.

Eucalyptus alipes is a mallet that is endemic to the south-west of Western Australia. It has smooth grey to light brown or bronze bark, linear to narrow elliptic leaves, oval to spindle-shaped buds with a long, narrow operculum and conical fruits.

<i>Eucalyptus socialis <span style="font-style:normal;">subsp.</span> eucentrica</i> Subspecies of plant

Eucalyptus socialis subsp. eucentrica, commonly known as the inland red mallee, is a subspecies of mallee that is endemic to inland Australia. It usually has rough bark on the base of the trunk, smooth bark above, lance-shaped adult leaves, flower buds in groups of between seven and eleven, pale creamy yellow flowers and barrel-shaped to urn-shaped or spherical fruit.

References

  1. "Eucalyptus urna". Australian Plant Census. Retrieved 13 January 2020.
  2. 1 2 3 4 "Eucalyptus urna". Euclid: Centre for Australian National Biodiversity Research. Retrieved 28 May 2020.
  3. 1 2 3 "Eucalyptus urna". FloraBase . Western Australian Government Department of Parks and Wildlife.
  4. 1 2 Johnson, lawrence A.S. (1999). "Systematic studies in the eucalypts. 9. A review of series Sociales (Eucalyptus subgenus Symphyomyrtus, Section Bisectaria, Myrtaceae)". Telopea. 8 (2): 209–210. doi: 10.7751/telopea19993001 .
  5. "Eucalyptus urna". APNI. Retrieved 13 January 2020.