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Eucalyptus distuberosa

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Species of eucalyptus

Eucalyptus distuberosa
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Eucalyptus
Species: E. distuberosa
Binomial name
Eucalyptus distuberosa
Nicolle

Eucalyptus distuberosa is a species of mallet that is endemic to the south-west of Western Australia. It has smooth dark grey to tan-coloured or creamy white bark, glossy dark green, lance-shaped adult leaves, flower buds in groups of seven, white flowers and cup-shaped to conical fruit.

Description

Eucalyptus distuberosa is a mallet that typically grows to a height of 5–14 m (16–46 ft) but does not form a lignotuber. It has smooth dark grey to tan-coloured or creamy-white bark that is shed in long ribbons. Adult leaves are glossy dark green, lance-shaped, 60–100 mm (2.4–3.9 in) long and 8–22 mm (0.31–0.87 in) wide on a petiole 10–15 mm (0.39–0.59 in) long. The flower buds are arranged in leaf axils, usually in groups of seven on an unbranched peduncle 5–13 mm (0.20–0.51 in) long, the individual buds on a pedicel 3–6 mm (0.12–0.24 in) long. Mature buds are oval to pear-shaped, 8–10 mm (0.31–0.39 in) long and 5–6 mm (0.20–0.24 in) wide with a conical to turban-shaped operculum. The flowers are white and the fruit is a woody cup-shaped to conical capsule, 5–8 mm (0.20–0.31 in) long and 6–8 mm (0.24–0.31 in) wide with the valves near the level of the rim.

Taxonomy and naming

Eucalyptus distuberosa was first formally described in 2009 by Dean Nicolle and the description was published in the journal Nuytsia from a specimen he collected in 2000 north-east of Yellowdine. The specific epithet (distuberosa) is derived from the Latin words dis meaning "without" or "not" and tuberosus meaning "full of lumps", referring to the lack of a lignotuber in this species.

There are two subspecies recognised by the Australian Plant Census:

  • Eucalyptus distuberosa subsp. aerata that has prominently ribbed buds and fruit;
  • Eucalyptus distuberosa subsp. distuberosa that lacks ornamentation on the buds and fruit, although intermediates are known.

Distribution

This mallet grows in mallee mainly between Yellowdine, the Frank Hann National Park and Norseman in the Avon Wheatbelt, Coolgardie and Mallee biogeographic regions of Western Australia. Subspecies aerata is only known from the Bronzite Ridge between Lake Johnston and Norseman.

Conservation status

Eucalyptus distuberosa subsp. distuberosa is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife but subspecies aerata is classified as "Priority One" meaning that it is known from only one or a few locations which are potentially at risk.

See also

References

  1. "Eucalyptus distuberosa". Australian Plant Census. Retrieved 23 June 2019.
  2. "Eucalyptus distuberosa subsp. distuberosa". Euclid: Centre for Australian National Biodiversity Research. Retrieved 4 June 2020.
  3. ^ Nicolle, Dean (2009). "Four obligate seeder taxa of Eucalyptus series Rufispermae (Myrtaceae) from the transitional rainfall zone of south-western Australia" (PDF). Nuytsia. 19 (1): 85–92. Retrieved 23 June 2019.
  4. "Eucalyptus distuberosa". APNI. Retrieved 23 June 2019.
  5. ^ Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press.
  6. "Eucalyptus distuberosa subsp. aerata". Australian Plant Census. Retrieved 23 June 2019.
  7. "Eucalyptus distuberosa subsp. distuberosa". Australian Plant Census. Retrieved 23 June 2019.
  8. ^ "Eucalyptus distuberosa subsp. distuberosa". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  9. ^ "Eucalyptus distuberosa subsp. aerata". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  10. "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 23 June 2019.
Taxon identifiers
Eucalyptus distuberosa
Eucalyptus distuberosa subsp. aerata
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