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Species profile—Corymbia petalophylla

Classification

Plantae (plants) → Equisetopsida (land plants) → MyrtaceaeCorymbia petalophylla

Photo of Corymbia petalophylla () - Queensland Herbarium, DES
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Species details

Kingdom
Plantae (plants)
Class
Equisetopsida (land plants)
Family
Myrtaceae
Scientific name
Corymbia petalophylla (Brooker & A.R.Bean) K.D.Hill & L.A.S.Johnson
WildNet taxon ID
6452
Alternate name(s)
Eidsvold yellow bloodwood
Nature Conservation Act 1992 (NCA) status
Vulnerable
Back on Track (BoT) status
Low
Conservation significant
Yes
Confidential
No
Endemicity
Native
Pest status
Nil
Description
Corymbia petalophylla is a tree 15 m in height with persistent bark almost throughout. The tree is often of poor form. The bark is soft, loosely scaly and fibrous, tessellated, yellow-brown to greyish yellow and yellow to orange on freshly broken surfaces. The juvenile leaves are opposite for three pairs, then disjunct. The juvenile leaves are setose with bristle-glands, and peltate at the next three nodes. The intermediate leaves are disjunct, becoming bristle free, narrow-ovate to suborbicular in shape, and acute to obtuse, to 18 cm long by 100 mm wide, with petioles 15 mm long. The adult leaves are disjunct and concolorous. They are dull, grey-green in colour, lanceolate to broad-lanceolate in shape, acuminate, 8 to 15 cm long by 17 to 35 mm wide. The petioles are 10 to 25 mm long. The intramarginal vein is distinct, and the oil glands are abundant, regular and obscured by the epidermis. The umbellasters are 7-flowered, with peduncles 10 to 23 mm long and the pedicels 1 to 5 mm long. The mature buds are green, ovoid, 6 to 8 mm long, by 4 to 5 mm in diameter. The operculum is 1/4 to 1/3 as long as the hypanthium. The fruits are globoid, 10 to 13 mm long by 9 to 11 mm in diameter. The seeds are glossy, red-brown, dorsiventrally compressed with a median dorsal keel, 2 to 3mm long by 1.5 to 2.5 mm wide (Hill and Johnson, 1995).
Corymbia petalophylla is distinguished by the dull, grey-green, large and relatively broad adult and juvenile leaves with long petioles, and by the small to medium-sized fruits. Intermediate leaves are very large, ovate, distinctly bluish and non-bristly. Juvenile to intermediate leaves are peltate only for about 3 to 6 nodes between nodes 3 and 10. (Hill and Johnson, 1995). Chemotaxonomy (essential oils) of the yellow bloodwood eucalypts has revealed that C. petalophylla is most similar to C. eximia; however, the relationship is not particularly close. C. petalophylla is notable for the high concentrationof alpha and beta-eudesmol in the leaves (Brophy et al. 1998).
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Distribution
Corymbia petalophylla has a scattered and sporadic distribution in rolling hill country in the Mundubbera -Eidsvold district. The species occurs only within Allies Creek State Forest (Queensland Herbarium, 2012).
Distributional limits
-25.3564719, 150.8774687
-26.0584183, 151.3597223
Range derivation
Range derived from extent of the taxon's verified records
Habitat
Corymbia petalophylla has been recorded growing on rocky lower slopes with granite outcrops. Associated species and vegetation include: woodland with Eucalyptus crebra, Corymbia watsoniana, E. tereticornis, Callitris endlicheri and Grevillea whiteana; woodland of Corymbia petalophylla, Eucalyptus dura and Allocasuarina inophloia; on granite hillside, with Eucalyptus exserta and Acacia neriifolia; dry sclerophyll woodland on sandy loam on granite on flat near creek beside rocky outcrop, with Eucalyptus crebra, E. tenuipes, E. baileyana, Lophostemon suaveolens, Corymbia trachyphloia, C. petalophylla and C. watsoniana (Queensland Herbarium, 2012).
Reproduction
Flowering Corymbia petalophylla has been recorded in July and September and fruiting from April to November (Queensland Herbarium, 2012).
Threatening processes
There are no immediate threats to this species, although the populations were directly threatened in the recent past by some land clearing activities (e.g. selective tree poisoning, powerline clearing) which may have reduced the number of populations and individuals. A major population occurs in the Beeron National Park and a minor population in Allies Creek State Forest. The populations west of Eidsvold are currently not in reserves (Forster, 1997).
Status notes
Corymbia petalophylla is listed as Vulnerable under the Queensland Nature Conservation Act 1992.
References
Brophy, J.J., Forster, P.I., Goldsack, R.J. and Hibbert, D.B. (1998). The essential oils of the yellow bloodwood eucalypts (Corymbia, section Ochraria, Myrtaceae). Biochemical Systematics and Ecology 26: 239-249.
Forster, P. (2007). Species Technical Committee. Nomination form and guidelines for re-classifying rare wildlife under the Nature Conservation Act 1992.
Hill, K.D. and Johnson, L.A.S. (1995). Systematic studies in the eucalypts. 7. A revision of the bloodwoods, genus Corymbia (Myrtaceae). Telopea 6 (2-3): 375.
Queensland Herbarium (2012). Specimen label information. Queensland Herbarium. Accessed 07/03/2012.
Profile author
Lynise Wearne (06/03/2012)

Other resources

The Australasian Virtual Herbarium (AVH)
Atlas of Living Australia

Data source

This profile data is sourced from the QLD Wildlife Data API using the Get species by ID function used under CC-By 4.0
https://apps.des.qld.gov.au/species/?op=getspeciesbyid&taxonid=6452

This information is sourced from the WildNet database managed by the Queensland Department of Environment and Science.

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Licence
Creative Commons Attribution 4.0 International (CC BY 4.0)
Last updated
7 September 2021
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