Corymbia setosa

Corymbia setosa, commonly known as the rough leaved bloodwood or desert bloodwood,[2] is a species of small tree that is endemic to north-eastern Australia. It has rough, tessellated brown bark on the trunk and branches, a crown of juvenile, heart-shaped leaves arranged in opposite pairs, flower buds in groups of three or seven, white flowers and urn-shaped to shortened spherical fruit.

Rough-leaved bloodwood
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Corymbia
Species:
C. setosa
Binomial name
Corymbia setosa
Synonyms[1]
  • Corymbia setosa subsp. pedicellaris K.D.Hill & L.A.S.Johnson
  • Corymbia setosa (Schauer)K.D.Hill & L.A.S.Johnson subsp. setosa
  • Eucalyptus hispida R.Br. ex Maiden nom. inval., pro syn.
  • Eucalyptus setosa Schauer
bark
flower buds
fruit

Description

Corymbia setosa is a tree that typically grows to a height of 4 metres (13 ft), rarely as a thick-trunked mallee, and forms a lignotuber. It has rough, deeply tessellated brownish bark on the trunk and branches and a sparse canopy. Young plants and coppice regrowth have sessile, heart-shaped leaves that are 38–78 mm (1.5–3.1 in) long and 17–33 mm (0.67–1.30 in) wide arranged in opposite pairs and with a rough surface. The crown of the tree has sessile, juvenile mostly heart-shaped, stem-clasping leaves that are the same shade of dull light green to greyish green on both sides, 27–77 mm (1.1–3.0 in) long and 10–50 mm (0.39–1.97 in) wide and arranged in opposite pairs. The flower buds are arranged on the ends of branchlets on a branched peduncle 3–25 mm (0.12–0.98 in) long, each branch of the peduncle with three or seven buds on pedicels 3–10 mm (0.12–0.39 in) long. Mature buds are pear-shaped, 6–12 mm (0.24–0.47 in) long and 5–7 mm (0.20–0.28 in) wide with a beaked operculum. Flowering has been observed in June, September and November and the flowers are white. The fruit is a woody urn-shaped or shortened spherical capsule 11–28 mm (0.43–1.10 in) long and 11–25 mm (0.43–0.98 in) wide with the valves enclosed in the fruit.[2][3][4][5][6][7]

Taxonomy and naming

This eucalypt was first formally described in 1843 by Johannes Conrad Schauer in Walpers' book Repertorium Botanices Systematicae and given the name Eucalyptus setosa from specimens collected by Ferdinand Bauer.[8][9] In 1995 Ken Hill and Lawrie Johnson changed the name to Corymbia setosa.[4][10] The specific epithet (setosa) is from the Latin word setosus meaning "bristly".[11]

In the same journal, Hill and Johnson described two subspecies, pedicellaris[12] and subspecies setosa[13] but the names are not accepted by the Australian Plant Census.

Distribution and habitat

Corymbia setosa grows on rocky hills and red sandy plains, but not extending to wet tropical areas. It is found from Tennant Creek, Northern Territory, Daly Waters and the Barkly Tableland in the Northern Territory and east into the Gulf of Carpentaria hinterland and islands, to the Musgrave area of Cape York Peninsula and as far south as Barcaldine in Queensland.[3]

In a woodland setting, associated species include Erythrophleum chlorostachys, Eucalyptus foelscheana, Xanthostemon paradoxus, Eucalyptus confertiflora and Eucalyptus latifolia in the overstorey and Grevillea decurrens, Gardenia megasperma and Calytrix exstipulata in the sparsely vegetated understorey.[14]

Conservation status

This species of eucalypt is classified as of "least concern" under the Queensland Government Nature Conservation Act 1992.[15]

See also

References
  1. "Corymbia setosa". Australian Plant Census. Retrieved 26 February 2020.
  2. Chippendale, George M. "Eucalyptus setosa". Flora of Australia. Australian Biological Resources Study, Department of Agriculture, Water and the Environment, Canberra. Retrieved 26 February 2020.
  3. "Corymbia setosa Rough-leaved bloodwood". Euclid: Centre for Australian National Biodiversity Research. Retrieved 26 February 2020.
  4. Hill, Kenneth D.; Johnson, Lawrence A.S. (13 December 1995). "Systematic studies in the eucalypts. 7. A revision of the bloodwoods, genus Corymbia (Myrtaceae)". Telopea. 6 (2–3): 356–359. doi:10.7751/telopea19953017.
  5. "Corymbia setosa (Schauer) K.D.Hill & L.A.S.Johnson". NT Flora. Northern Territory Government. 2013. Retrieved 11 October 2016.
  6. "Corymbia setosa Desert Bloodwood, Rough-leaved Bloodwood Myrtaceae". The Society for Growing Australian Plants. Retrieved 11 October 2016.
  7. "Corymbia setosa (Schauer) K.D. Hill & L.A.S. Johnson, Telopea 6: 356 (1995)". Eucalink. Royal Botanic Garden, Sydney. Retrieved 11 October 2016.
  8. "Eucalyptus setosa". APNI. Retrieved 26 February 2020.
  9. Schauer, Johannes Conrad; Walpers, Wilhelm Gerhard (1843). Repertorium Botanices Systematicae. New York: Sumtibus Friderici Hofmeister. p. 926. Retrieved 26 February 2020.
  10. "Corymbia setosa". APNI. Retrieved 26 February 2020.
  11. William T. Stearn (1992). Botanical Latin. History, grammar, syntax, terminology and vocabulary (4th ed.). Portland, Oregon: Timber Press. p. 493.
  12. "Eucalyptus setosa subsp. pedicellaris". APNI. Retrieved 26 February 2020.
  13. "Eucalyptus setosa subsp. setosa". APNI. Retrieved 26 February 2020.
  14. C.M. Finlayson; Isabell von Oertzen (2012). Landscape and Vegetation Ecology of the Kakadu Region, Northern Australia. Springer Science & Business Media. ISBN 9789400901339.
  15. "Corymbia setosa". Wetlandinfo. Queensland Government. Retrieved 11 October 2016.
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