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Article     |     Next >>   Contents Vol 26(4)

Morphometric analysis of Correa lawrenceana (Rutaceae) and the reinstatement of var. ferruginea endemic to Tasmania

Raja Nur Ateeka Othman A C , Gregory J. Jordan A and Marco F. Duretto B D

A School of Plant Science, University of Tasmania, Private Bag 55, Hobart, Tas. 7001, Australia.
B National Herbarium of New South Wales, Royal Botanic Gardens and Domain Trust, Mrs Macquaries Road, Sydney, NSW 2000, Australia.
C Present address: Faculty of Plantation, University Technology MARA (UiTM), 40450 Shah Alam, Selangor, Malaysia.
D Corresponding author. Email: marco.duretto@rbgsyd.nsw.gov.au

Australian Systematic Botany 26(4) 255-267 http://dx.doi.org/10.1071/SB13013
Submitted: 18 March 2013  Accepted: 9 September 2013   Published: 13 December 2013


 
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Abstract

Correa lawrenceana Hook. is a widespread species in south-eastern Australia with eight recognised varieties. The Tasmanian variety, var. lawrenceana, is morphologically diverse. The present study uses multivariate morphometrics, including cluster, ordination and canonical discriminant analyses of samples of all recognised varieties of C. lawrenceana to assess whether more than one Tasmanian form warrants taxonomic recognition. These analyses showed that (1) var. lawrenceana can be divided into two well discriminated groups that are both endemic to Tasmania, a glabrescent form from the north-east and a hirsute form from the western, central and south-eastern regions, (2) the glabrescent form matches the type of C. lawrenceana and thus retains the name var. lawrenceana, and the hirsute form matches the type of C. lawrenceana var. ferruginea Hook.f. that is reinstated. The two varieties are separated geographically except in a small area around Deloraine in the north where intermediate morphological forms occur. The density of trichomes on the abaxial leaf surface is important for distinguishing the two Tasmanian varieties. An updated key to all varieties of C. lawrenceana along with descriptions of the Tasmanian varieties is presented. Nomenclature of the Tasmanian taxa is discussed and C. lawrenceana, C. lawrenceana var. glabra Benth., C. lawrenceana var. glabra L.Rodway and C. ferruginea Gunn ex Hook. are lectotypified.

Additional keyword: taxonomy.


References

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Othman RNA, Jordan GJ, Worth JRP, Steane DA, Duretto MF (2010) Phylogeny and infrageneric classification of Correa Andrews (Rutaceae) on the basis of nuclear and chloroplast DNA. Plant Systematics and Evolution 288, 127–138.
CrossRef |

Rodway L (1903) ‘The Tasmanian Flora.’ (Government Printer: Hobart)

Sneath PHA, Sokal RR (1973) ‘Numerical Taxonomy: the Principles and Practice of Numerical Classification.’ (W. H. Freeman: San Francisco, CA)

Wilson PG (1961) A taxonomic revision of the genus Correa (Rutaceae). Transactions of the Royal Society of South Australia 85, 21–53.

Wilson PG (1998) Notes on the genus Correa (Rutaceae). Nuytsia 12, 89–105.

Wilson PG (2013) Correa (Rutaceae). In ‘Flora of Australia, Vol. 26’. (Ed. A Wilson) pp. 337–361. (CSIRO Publishing: Melbourne)


   
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