Eucalyptus goniantha

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Jerdacuttup mallee
Eucalyptus goniantha.jpg
Eucalyptus goniantha in Torndirrup National Park
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. goniantha
Binomial name
Eucalyptus goniantha
Synonyms [1]

Eucalyptus incrassata var. goniantha(Turcz.) Maiden

Contents

Eucalyptus goniantha, commonly known as Jerdacuttup mallee, [2] is a species of mallee, or rarely a tree, that is endemic to Western Australia. It has smooth bark, lance-shaped adult leaves, flower buds in groups of between seven and eleven, creamy white flowers and more or less ribbed, hemispherical fruit.

flower buds of subsp. goniantha Eucalyptus goniantha buds.jpg
flower buds of subsp. goniantha
fruit of subspecies goniantha Eucalyptus goniantha fruit.jpg
fruit of subspecies goniantha
bark Eucalyptus goniantha bark.jpg
bark

Description

Eucalyptus goniantha is a mallee, rarely a tree, that typically grows to a height of 1.5–10 m (4 ft 11 in – 32 ft 10 in) and forms a lignotuber. It has smooth, grey to pale brown bark. Young plants and coppice regrowth have leaves that are oblong to egg-shaped or almost round. Adult leaves are lance-shaped, 80–135 mm (3.1–5.3 in) long and 20–32 mm (0.79–1.26 in) wide on a petiole 10–23 mm (0.39–0.91 in) long. The flower buds are arranged in leaf axils in groups of seven, nine or eleven on an unbranched peduncle 11–15 mm (0.43–0.59 in) long, the individual buds on pedicels 2–10 mm (0.079–0.394 in) long. Mature buds are oval, creamy yellow, 8–11 mm (0.31–0.43 in) long and 6–8 mm (0.24–0.31 in) wide with a rounded to bluntly beaked operculum. Flowering mainly occurs from November to January and the flowers are creamy white. The fruit is a woody hemispherical to shortened spherical capsule 7–11 mm (0.28–0.43 in) long and 8–14 mm (0.31–0.55 in) wide, strongly or weakly ribbed, with the valves protruding but fragile. [2] [3] [4]

Taxonomy and naming

Eucalyptus goniantha was first formally described in 1847 by Nikolai Turczaninow in Bulletin de la Société Impériale des Naturalistes de Moscou. [5] [6] In 1976, Ian Brooker described subspecies goniantha and semiglobosa, but only subsp. goniantha has been accepted by the Australian Plant Census. [7] [8] In 2012, Dean Nicolle described subspecies kynoura and the name has been accepted by the Australian Plant Census. It differs mainly in having strongly ribbed fruit. [4] [9] The specific epithet goniantha is from the Greek gonio-, angled and anthos, flower, referring to the ribbed flower buds and fruit. [3] The epithet kynoura is from the Greek kynouron meaning "sea-cliff", referring to the habitat of the subspecies. [4]

Distribution and habitat

Both subspecies of E. goniantha grow in exposed coastal and near-coastal places in thin sandy soil, usually over limestone. Subspecies goniantha is found between Mutton Bird Island and the Flinders Peninsula near Albany, and as far inland as Manypeaks where it intergrades with E. ecostata . Subspecies kynoura is only found at Point Hillier near Denmark. [4]

Conservation status

Subspecies goniantha is classified as "not threatened" [10] but subspecies kynoura is classified as "Priority Two" by the Western Australian Government Department of Parks and Wildlife [11] meaning that it is poorly known and from only one or a few locations. [12]

See also

Related Research Articles

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<i>Eucalyptus semiglobosa</i> Species of eucalyptus

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References

  1. 1 2 "Eucalyptus goniantha". Australian Plant Census. Retrieved 20 July 2019.
  2. 1 2 "Eucalyptus goniantha". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  3. 1 2 "Eucalyptus goniantha subsp. goniantha". Euclid: Centre for Australian National Biodiversity Research. Retrieved 2 June 2020.
  4. 1 2 3 4 Nicolle, Dean; French, Malcolm E. (2012). "A revision of Eucalyptus ser. Falcatae (Myrtaceae) from southwestern Australia, including the description of new taxa and comments on the probable origin of ''E.balanites, E. balanopelex and E. phylacis" (PDF). Nuytsia. 22 (6): 434–437. Retrieved 20 July 2019.
  5. "Eucalyptus goniantha". APNI. Retrieved 20 July 2019.
  6. Turczaninow, Nikolai (1847). "Decas tertia generum adhuc non descriptorum, adjectis descriptionibus nonnullarum specierum Myrtacearum xerocarpicarum atque Umbelliferarum imperfectarum". Bulletin de la Société impériale des naturalistes de Moscou: 163. Retrieved 20 July 2019.
  7. Brooker, M. Ian H. (1976). "Six new taxa of Eucalyptus from Western Australia". Nuytsia. 2 (2): 110–112. Retrieved 20 July 2019.
  8. "Eucalyptus goniantha subsp. goniantha". Australian Plant Census. Retrieved 20 July 2019.
  9. "Eucalyptus goniantha subsp. kynoura". Australian Plant Census. Retrieved 20 July 2019.
  10. "Eucalyptus goniantha subsp. goniantha". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  11. "Eucalyptus goniantha subsp. kynoura". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  12. "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 20 July 2019.