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Australian Systematic Botany Australian Systematic Botany Society
Taxonomy, biogeography and evolution of plants
RESEARCH ARTICLE

Systematic studies in Lepidosperma (Cyperaceae: Schoeneae) with particular reference to L. laterale

John Hodgon A , Jeremy J. Bruhl A C and Karen L. Wilson B
+ Author Affiliations
- Author Affiliations

A Botany, Centre for Ecology, Evolution and Systematics, The University of New England, Armidale, NSW 2351, Australia.

B Royal Botanic Gardens Sydney, Mrs Macquaries Road, Sydney, NSW 2000, Australia.

C Corresponding author. Email: jbruhl@une.edu.au

Australian Systematic Botany 19(3) 273-288 https://doi.org/10.1071/SB06007
Submitted: 10 October 2002  Accepted: 9 March 2006   Published: 30 June 2006

Abstract

Lepidosperma laterale exhibits much morphological variation across its geographical range. This study included L. laterale, and morphologically similar species, as well as several comparator species. Phenetic analyses based on 27 morphological and 25 vegetative anatomical characteristics were undertaken in an attempt to resolve taxonomic issues within the study group. Evidence for broadening the delimitation of L. laterale is strong as OTUs of this variable species formed a group with indistinct clusters in all analyses. The mixed, diffuse clusters obtained of OTUs of specimens identified as L. gunnii with specimens of L. laterale suggest that the species limits of the former lie within the limits of the latter. Specimens of most other study group taxa formed relatively cohesive, discrete clusters in ordination and cluster analyses. The results provide strong support for recognition of L. sp. Whian Whian S.F. (J. Hodgon 331 & D.M. Hodgon) and L. sp. Mt Coolum (P.R. Sharpe 5605A) as new species.


Acknowledgments

We thank Phillip Sharpe (BRI) for collecting specimens and for freely sharing his exceptional knowledge and enthusiasm, Associate Professor Prakash (UNE) for advice and encouragement, technical staff at Botany, UNE for assistance, Peter Garlick of the Electron Microscope Unit (UNE) for his invaluable assistance with SEM techniques, the Directors of BRI and NSW for access to collections and staff for assistance, the Directors of AD, B, CHR, HO and MEL for loan material, National Parks and Wildlife Service of NSW and Queensland Parks and Wildlife Service for permission to collect, and Ian Telford (NE) and two anonymous referees for constructive comments on the manuscript. Generous support to John Hodgon as an Honours student, provided by the Australian Systematic Botany Society through the Hansjorg Eichler Scientific Research Fund and The University of New England through the N.C.W. Beadle Fund and Friends of Botany Fund, is gratefully acknowledged.


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Appendix 1. Data matrix 1 (full data matrix) used in phenetic analyses (for data matrix see the website of Australian Systematic Botany)

Each column represents a character state. Characters and character states with all invariant and / or missing values have been removed from the matrix. –9999 = missing value. OTU codes, first three letters: GUN, Lepidosperma gunnii; AGU, L. sp. Coaldale; ELA, L. elatius; AEL, L. sp. Whian Whian S.F.; LAT, L. laterale var. laterale; LAM, L. laterale var. majus; LAA, L. laterale var. angustum; LSN, L. sp. Mt Coolum; CUR, L. curtisiae; ACU, L. sp. Hardacres; LAN, L. latens; FIL, L. filiforme; TOR, L. tortuosum; VIS, L. viscidum; GLO, L. globosum; INO, L. inops; ENS, L. ensiforme; OLD, L. oldfieldii; SER, Schoenus ericetorum; SME, S. melanostachys. Fourth letter: Q, Queensland; N, New South Wales; V, Victoria; T, Tasmania; S, South Australia; C, New Caledonia; Z, New Zealand. Herbarium location for each specimen is given in parentheses following collector information.


Appendix 2. Data matrix 2 used in phenetic analyses

The matrix is constructed by deleting all OTUs (rows) from data matrix 1, except those representing Lepidosperma laterale var. laterale, L. laterale var. angustum, L. laterale var. majus, L. gunnii, L. sp. Coaldale and L. sp. Hardacres. Characters and character states with all invariant and / or missing values are then removed.


Appendix 3. Data matrix 3 used in phenetic analyses

The matrix is constructed by deleting all OTUs (rows) from data matrix 1 representing Lepidosperma laterale var. laterale, L. laterale var. angustum, L. laterale var. majus, L. gunnii, L. sp. Coaldale and L. sp. Hardacres. Characters and character states with all invariant and / or missing values are then removed and the OTU code ENSV is changed to AELV (see text for explanation).


Appendix 4. Data matrix 4 used in phenetic analyses

The matrix is constructed by deleting all OTUs (rows) from data matrix 1, except those representing Lepidosperma elatius, L. sp. aff. elatius, L. ensiforme, L. oldfieldii, Schoenus ericetorum and S. melanostachys, from data matrix 1. Characters and character states with all invariant and or missing values are then removed and the OTU code ENSV is changed to AELV (see text for explanation).