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A review of the genus Lepidosperma Labill. (Cyperaceae: Schoeneae)

Authors:
  • Botanic Gardens of Sydney
  • Royal Botanic Gardens and Domain Trust, Sydney

Abstract

Species diversity in the genus Lepidosperma Labill. is much greater than previously thought. On the basis of morphological and molecular data, we currently recognise 73 named species (mainly in Australia), with many more species yet to be described. As a precursor to a complete revision, we review the names published in Lepidosperma. All published names at infrageneric, specific and infraspecific rank are typified and their current taxonomic status is indicated. Brief distribution notes are given for the 73 named species recognised. We also give a list of names referrable to other genera. A summary of the taxonomic history of the genus is provided, as well as notes on the specimens collected by early collectors in Australia. Three new combinations are made in Lepidosperma: L. asperatum (Kük.) R.L.Barrett, L. neozelandicum (Kük.) R.L.Barrett&K.L.Wilson and L. rigidulum (Kük.) K.L.Wilson. L. sanguinolentum K.L.Wilson is a nomen novum based on L. drummondii var. floribundum Kük. Lectotypes are designated for eight infrageneric names and for 39 specific and infraspecific names, including the following: L. angustifolium Hook.f., L. angustatum R.Br., L. angustatum var. curvispiculum Benth., L. australe (A.Rich.) Hook.f., L. benthamianum C.B.Clarke, L. brunonianum Nees, L. brunonianum var. binuciferum Kük., L. canescens Boeckeler, L. carphoides Benth., L. concavum var. pyramidatum Benth., L. confine Nees, L. costale Nees, L. costale var. densispicatum Kük., L. drummondii Benth., L. effusum Benth., L. forsythii A.A.Ham., L. gladiatum Labill., L. globosum Labill., L. inops F.Muell. ex Rodway, L. laterale var. angustum Benth., L. laterale var. majus Benth., L. leptophyllum Benth., L. leptostachyum Benth., L. leptostachyum var. asperatum Kük., L. muelleri Boeckeler, L. neesii Kunth, L. perplanum Guillaumin, L. perteres C.B.Clarke, L. pruinosum Kük., L. pruinosum var. rigidulum Kük., L. quadrangulatum A.A.Ham., L. resinosum var. pleianthemum Kük., L. scabrum Nees, L. scabrum var. effusum Benth., L. sieberi Kunth, L. squamatum Labill., L. tenue Benth., L. viscidum R.Br. and L. viscidum var. subpyramidale Kük. Twenty-two excluded names are listed and new combinations are provided in Tricostularia for L. aphyllum R.Br. and L. exsul C.B.Clarke. A lectotype is selected for L. pauciflorum F.Muell. (= Tricostularia pauciflora (F.Muell.) Benth.).
A review of the genus Lepidosperma Labill. (Cyperaceae:
Schoeneae)
Russell L. Barrett
A,B,C,E
and Karen L. Wilson
D
A
Botanic Gardens and Parks Authority, Kings Park and Botanic Garden, West Perth, WA 6005, Australia.
B
School of Plant Biology, Faculty of Natural and Agricultural Sciences, The University of Western Australia,
Crawley, WA 6009, Australia.
C
Western Australian Herbarium, Department of Environment and Conservation, Locked Bag 104,
Bentley Delivery Centre, WA 6983, Australia.
D
National Herbarium of NSW, Royal Botanic Garden, Mrs Macquaries Road, Sydney, NSW 2000, Australia.
Email: karen.wilson@rbgsyd.nsw.gov.au
E
Corresponding author. Email: russell.barrett@bgpa.wa.gov.au
Abstract. Species diversity in the genus Lepidosperma Labill. is much greater than previously thought. On the basis of
morphological and molecular data, we currently recognise 73 named species (mainly in Australia), with many more
species yet to be described. As a precursor to a complete revision, we review the names published in Lepidosperma.
All published names at infrageneric, specic and infraspecic rank are typied and their current taxonomic status is
indicated. Brief distribution notes are given for the 73 named species recognised. We also give a list of names referrable to
other genera. A summary of the taxonomic history of the genus is provided, as well as notes on the specimens collected
by early collectors in Australia. Three new combinations are made in Lepidosperma: L. asperatum (Kük.) R.L.Barrett,
L. neozelandicum (Kük.) R.L.Barrett & K.L.Wilson and L. rigidulum (Kük.) K.L.Wilson. L. sanguinolentum K.L.Wilson is a
nomen novum based on L. drummondii var. oribundum Kük. Lectotypes are designated for eight infrageneric names
and for 39 specic and infraspecic names, including the following: L. angustifolium Hook.f., L. angustatum R.Br.,
L. angustatum var. curvispiculum Benth., L. australe (A.Rich.) Hook.f., L. benthamianum C.B.Clarke, L. brunonianum
Nees, L. brunonianum var. binuciferum Kük., L. canescens Boeckeler, L. carphoides Benth., L. concavum var. pyramidatum
Benth., L. conne Nees, L. costale Nees, L. costale var. densispicatum Kük., L. drummondii Benth., L. effusum Benth.,
L. forsythii A.A.Ham., L. gladiatum Labill., L. globosum Labill., L. inops F.Muell. ex Rodway, L. laterale var. angustum
Benth., L. laterale var. majus Benth., L. leptophyllum Benth., L. leptostachyum Benth., L. leptostachyum var.
asperatum
Kük., L. muelleri Boeckeler, L. neesii Kunth, L. perplanum Guillaumin, L. perteres C.B.Clarke, L. pruinosum Kük.,
L. pruinosum var. rigidulum Kük., L. quadrangulatum A.A.Ham., L. resinosum var. pleianthemum Kük., L. scabrum Nees,
L. scabrum var. effusum Benth., L. sieberi Kunth, L. squamatum Labill., L. tenue Benth., L. viscidum R.Br. and L. viscidum
var. subpyramidale Kük. Twenty-two excluded names are listed and new combinations are provided in Tricostularia for
L. aphyllum R.Br. and L. exsul C.B.Clarke. A lectotype is selected for L. pauciorum F.Muell. (= Tricostularia pauciora
(F.Muell.) Benth.).
Received 13 October 2011, accepted 29 June 2012, published online 15 August 2012
Introduction
Species diversity in the genus Lepidosperma Labill. is much
greater than previously thought. On the basis of morphological
and molecular data, we currently recognise 73 named species
(mainly in Australia), with many more species yet to be described.
As a precursor to a taxonomic revision of the genus, for the Flora
of Australia project, we review the names currently accepted as
applying to taxa in this genus (Barrett 2012), as well as provide a
list of excluded names considered referable to other genera.
All published names at infrageneric, specic and infraspecic
rank are typied and their current taxonomic status is indicated.
Images of type specimens are included and brief distribution
notes are given for the 73 named species as an interim aid to
identifying this difcult group.
Lepidosperma (Labillardière 1805) was erected for seven
species cited as being collected from Tasmania (but at least
one was actually from Western Australia). Brown (1810)
enumerated 19 species from across southern Australia. Further
taxa were described by Richard (1832, under Vauthiera A.
Rich.), Kunth (1837), Nees (in Lehmann 1844, under
Machaerina Vahl), Nees von Esenbeck (
1846), Hooker (1853,
1858), Steudel (1855), Boeckeler (1874) and Mueller (1875).
The Australian taxa were then reviewed by Bentham (1878),
who was the rst to propose an infrageneric classication
Journal compilation Ó CSIRO 2012 www.publish.csiro.au/journals/asb
CSIRO PUBLISHING
Australian Systematic Botany, 2012, 25, 225294
Review
http://dx.doi.org/10.1071/SB11037
Full version available from www.publis.csiro.au
Acknowledgements
Russell L. Barrett was the recipient of an Australian Postgraduate Award.
Additional travel funding was provided to R. L. Barrett by the School of Plant
Biology, The University of Western Australia. Aspects of this work were
supported by Alcoa World Alumina (Australia), Worsley Alumina Pty Ltd,
Landcare Services and the Friends of Kings Park. Karen Wilson
acknowledges the support of the Australian Biological Resources Study
when she was Australian Botanical Liaison Ofcer at the Royal Botanic
GardensKew(19881989)andfor a research granttoK.Wilsonand J. J. Bruhl
(2009). She was the recipient of a travel grant from the Friends of the Botanic
Gardens to visit BM, K and LD in 2008. We thank directors of the
following herbaria for permission to reproduce images of type specimens
held in their collections: B, BM, BRI,DNA, FI,G, HO, K, L,LD, MEL,NSW,
P, PERTH. Images from collections at K were reproduced with the
permission of the Board of Trustees, Royal Botanic Gardens, Kew. Images
from MEL were reproduced with permission from the State Botanical
Collection, National Herbarium of Victoria (MEL). Images from P are
from the Muséum National dHistoire Naturelle collection, Paris. All
images are not to be further reproduced without permission from the
respective herbaria. We thank Zoe Davies, Matt Barrett, Jeremy Bruhl,
Gillian Craig, Rob Davis, Kingsley Dixon, Marco Duretto, Alex George,
Steve Hopper, Greg Keighery, Karina Knight, Siegfried Krauss, Neville
Marchant, Guiseppe Messina, Kelly Shepherd, Cate Tauss, Kevin Thiele,
Stephen Vlahos, Mark Wallace, Juliet Wege, David Willyams, Alastair
Wilson, Paul Wilson and Peter Wilson for their support and advice on
aspects of this research. Jeremy Bruhl is thanked for photographing
specimens at E and FI while serving as ABLO at K and for images of
material on loan to NE from B. John McNeill is thanked for providing
nomenclatural advice on the publication of Machaerina tetragona. Two
anonymous reviewers are thanked for comments that signicantly
improved the manuscript. We are grateful to directors, curators and staff
for assisting in our visits to herbaria and organising loans and images of
specimens, including Juergen Kellermann, Rosemary Taplin, Helen Vonow,
Andrea Ramsay, Robyn Barker, Bill Barker and Graham Bell at AD; Ludwig
Martins for his patient assistance and Robert Vogt at B; Rob Huxley and Roy
Vickery at BM; Ailsa Holland, Ron Booth and Gordon Guymer at BRI;
Brendan Lepschi and Jo Palmer at CANB; Giorgio Padovani and Piero
Cuccuini at FI; Nicholas Fumeaux at G; Wieland Kirschner at HBG;
Marco Duretto and Alex Buchanan at HO; Juliet Wege and Jeremy Bruhl
while serving as ABLO at K; David Simpson at K; J. Veldkamp, Peter
Audiffred and Gerard Thijsse at L; Ingvar Kärnefelt, Patric Frodin and Arne
Thell at LD; Josephina Milne, Valantino Stajsic, Wayne Gebert, Neville
Walsh, Catherine Gallagher and Jill Thurlow at MEL; Jeremy Bruhl and Ian
Telford at NE; Barbara Briggs and Peter Wilson (for nomenclatural advice),
Leonie Stanberg and Clare Herscovitch at NSW; Wayt Thomas at NY;
Grégoire Flament and Philippe Morat at P; Karina Knight, Kevin Thiele,
Kelly Shepherd, Juliet Wege, Meriel Falconer, Susan Carroll, Cheryl Parker,
Skye Coffey and Louise Biggs at PERTH; and Mark Strong at US.
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292 Australian Systematic Botany R. L. Barrett and K. L. Wilson
... The inclusion in Tricostularia of Tricostularia aphylla and T. exsul is strongly supported (PP 1); these two species were transferred from Lepidosperma Labill. by Barrett and Wilson (2012). ...
... Notes: A lectotype is selected for Lepidosperma exsul C.B.Clarke as, while Clarke (1908) specified material at G-DC, there are three sheets held at G-DC, and additional material at K (one sheet ex G-DC, ironically originally ex K), P and TCD. There may well be additional sheets that we are yet to trace as Drummond commonly collected many duplicates (see Barrett and Wilson 2012). We choose G-DC 00195302 as the lectotype as this sheet has the amplest material and an annotation by Clarke. ...
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... Ecological Informatics 84 (2024) 102921 to herbarium vouchers are accurate, and whilst this is usually the case, identification errors are also present within herbarium collections. For certain taxa these errors manifest as systematic patterns of misidentifications, with some genera or families consistently misidentified at higher rates than other taxa (Barrett and Wilson, 2012;Cardoso et al., 2024;Coca-de-la-Iglesia et al., 2024;Utjés et al., 2022). Similarly, misidentification of a voucher is more likely for small herbaria and herbaria far from the collection source, where the determiner may lack expertise with the regional flora of the voucher's original location. ...
... This may be due to the similarity of many species and the difficulty of capturing necessary diagnostic characters in photographs, or the disincentivisation to either photograph, or attempt to identify from photographs, taxa renowned as hard to identify. For example, species identification within Lepidosperma (Cyperaceae, 38/75 species photographed) can be difficult even from specimens if material is incomplete (Barrett & Wilson, 2012), let alone from photographs, and grasses are often difficult to identify from photographs, especially when not flowering (Rzanny et al., 2019. ...
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The photographic record is increasingly becoming an important biodiversity resource for primary research and conservation monitoring. However, globally, there are important gaps in this record even in relatively well‐researched floras. To quantify the gaps in the Australian native vascular plant photographic record, we systematically surveyed 33 sources of well‐curated species photographs, assembling a list of species with accessible and verifiable photographs, as well as the species for which this search failed. Of 21 077 Australian native species, 3715 lack a verifiable photograph across our 33 surveyed resources. There are three major geographic hotspots of unphotographed species in Australia, all far from current population centres. Many unphotographed species are small in stature or uncharismatic, and many are also recently described. The large number of recently described species without accessible photographs was surprising. There are longstanding efforts in Australia to organise the plant photographic record, but in the absence of a global consensus to treat photographs as an essential biodiversity resource, this has not become common practice. Many recently described species are small‐range endemics and some have special conservation status. Completing the botanical photographic record across the globe will facilitate a virtuous feedback loop of more efficient identification, monitoring and conservation.
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We here describe Machaerina ascendens R.L.Barrett & K.L.Wilson as a new species from swamps within forests in the far southwest of Western Australia. The new species is readily identifiable by its scrambling habit and compressed, multi-noded culms, features which separate it from all other Australian species. The clearly distichous glumes, few hypogynous scales fused at the base into a ring and prominently stipitate nutlets are also unusual features in Machaerina Vahl. Machaerina ascendens is highly range-restricted by its specific habitat and appears to qualify for listing as Endangered. Study of all names applicable to the current concept of Machaerina revealed an earlier name for the eastern Australian species Machaerina nuda (Steud.) J.Kern, and a new combination is provided here for Schoenus abbreviatus Nees as Machaerina abbreviata (Nees) R.L.Barrett & K.L.Wilson.
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George Bentham (1800–84) was one of Britain's most influential botanists, whose own collection of plant specimens numbered more than 100,000. Although he donated his herbarium to the Royal Botanic Gardens, Kew in 1854, he continued to make significant contributions to the field, including this exhaustive, seven-volume work detailing the plant life of Australia, which was published from 1863 to 1878. It was part of a series of works commissioned by the British government to document the flora in its colonies. Using the extensive numbers of specimens at Kew - and with the help of Ferdinand Mueller (1825–96), a German botanist in Australia - Bentham was able to compile descriptions of more than 8,000 species of Australian plants, making these volumes the first completed compendium of the flora of any large continental area. Volume 2, published in 1864, gives descriptions of seven orders of the dicotyledon class of flowering plant.
Book
George Bentham (1800–84) was one of Britain's most influential botanists, whose own collection of plant specimens numbered more than 100,000. Although he donated his herbarium to the Royal Botanic Gardens, Kew in 1854, he continued to make significant contributions to the field, including this exhaustive, seven-volume work detailing the plant life of Australia, which was published from 1863 to 1878. It was part of a series of works commissioned by the British government to document the flora in its colonies. Using the extensive numbers of specimens at Kew - and with the help of Ferdinand Mueller (1825–96), a German botanist in Australia - Bentham was able to compile descriptions of more than 8,000 species of Australian plants, making these volumes the first completed compendium of the flora of any large continental area. Volume 7, published in 1878, concludes with descriptions of flora in the classes of monocotyledon and cryptogamae.
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An overview is provided of the Western Australian species of Bossiaea. Thirty-eight species are recognised of which the following are described here as new: B. arcuata, B. atrata, B. aurantiaca, B. barbarae, B. barrettiorum, B. calcicola, B. celata, B. eremaea, B. flexuosa, B. inundata, B. laxa, B. saxosa, B. simulata and B. smithiorum. Descriptions, distribution maps, and a key to identification are provided and most species are illustrated. Attention is drawn to a number of entities whose taxonomic status awaits clarification. Lectotypes are selected for B. concinna Benth., B. dentata (R.Br.) Benth. var. latifolia Benth., B. dentata var. hastata Benth., B. disticha Lindl., B. divaricata Turcz., B. eriocarpa Benth., B. eriocarpa var. eriocalyx Benth., B. eriocarpa var. planifolia Domin, B. gilbertii Turcz., B. lalagoides F.Muell., B. linophylla R.Br., B. nervosa Meisn., B. ovalifolia Endl., B. oxyclada Turcz., B. peduncularis Turcz., B. preissii Meisn., B. rigida Turcz., B. sulcata Meisn., B. walkeri F.Muell., B. webbii F.Muell., Lalage acuminata Meisn., L. angustifolia Meisn., L. hoveifolia Benth., L. ornata Lindl., L. stipularis Meisn., Platylobium spinosum Turcz., Scottia angustifolia Lindl., S. dentata R.Br. and S. laevis Lindl. A neotype is selected for B. leptacantha E. Pritz.