Volume 19 Number 2
Thursday, 17 December 2009
Permalink: https://doi.org/10.58828/niss00055
Lectotypification of ten Restionaceae species names from south-west Western Australia
BARRETT, R.L. AND BRIGGS, B.G., Nuytsia 19 (2): 203–209 (2009)
A lectotype is selected for ten names published in 1993 and 1996 by K. Dixon, K.A. Meney and J. Pate for species of Restionaceae in the genera Desmocladus Nees, Harperia W.Fitzg., Hypolaena R.Br., Lepidobolus Nees, Loxocarya R.Br., Onychosepalum Steud., Leptocarpus R.Br. and Restio Rottb. The relevant species originally named in Leptocarpus and Restio are now included in Meeboldina Suess. and Chordifex B.G.Briggs & L.A.S.Johnson respectively. Additional collections of the ten taxa involved are also cited.
New taxa in the Leucopogon gracilis group (Ericaceae: Styphelioideae: Styphelieae)
HISLOP, M., Nuytsia 19 (2): 211–228 (2009)
Three new taxa, Leucopogon paradoxus Hislop, L. tenuicaulis Hislop and L. elegans Sond. subsp. psorophyllus are described. The first two of these are illustrated and the distributions of all three are mapped. A key is provided for all Western Australian taxa currently referred to the informal, subgeneric Leucopogon gracilis Group (sensu Hislop & Chapman 2007). Lectotypes are designated for the following taxa: Leucopogon elegans Sond., L. gracilis R.Br., L. oppositifolius Sond. and L. oppositifolius var. pubescens Sond.
Grevillea tetragonoloba (Proteaceae: Grevilleoideae) recircumscribed, with notes on its typification and a new segregate species, Grevillea nivea, described
OLDE, PETER M. AND MARRIOTT, NEIL R., Nuytsia 19 (2): 229–243 (2009)
Grevillea nivea P.M.Olde & N.R.Marriott is the third species that we have segregated and described from Grevillea tetragonoloba Meisner sensu McGillivray. The type citation of Grevillea tetragonoloba is discussed and modified. Recognition of Grevillea nivea as distinct from Grevillea tetragonoloba requires a modified circumscription for the latter species, and a full, updated description is provided here. A key is provided enabling distinction from closely related species.
A new subspecies of Acacia pentadenia (Leguminosae: Mimosoideae) from south-western Australia
REID, J.E., WARDELL-JOHNSON, G. AND MASLIN, B.R., Nuytsia 19 (2): 245–252 (2009)
A previously recognised informal variant of Acacia pentadenia Lindl. is described following extensive field and herbarium studies focused on the forest region to the north-east of Walpole. The new subspecies, Acacia pentadenia subsp. syntoma, is most readily distinguished from subsp. pentadenia by a combination of morphological attributes, as well as habit , phenological and ecological differences. Field observations have shown the two subspecies to be occasionally sympatric. A key to the subspecies is provided together with a distribution map and comparative images.
A new species of Hakea (Proteaceae) from the Swan Coastal Plain, Western Australia
SHEPHERD, K.A. AND BARKER, R.M., Nuytsia 19 (2): 253–258 (2009)
Hakea oligoneura K.A.Sheph. & R.M.Barker,a new species described herein, is only known from a few populations less than 100 km from the Perth metropolitan area. A distribution map and images of this new species are included.
Thysanotus unicupensis (Laxmanniaceae), a new species discovered in Unicup Nature Reserve, south-west Western Australia
SIRISENA, U.M., MACFARLANE, T.D. AND CONRAN, J.G., Nuytsia 19 (2): 259–263 (2009)
Thysanotus unicupensis is described as a new species from south-west Western Australia. This species shows some affinities to T. chinensis, T. formosus and T.parviflorus and is apparently localised on lateritic soils in moderately sunny areas within Jarrah/ Marri (Eucalyptus marginata/Corymbia calophylla) woodlands. The key published in Flora of Australia (1987) is amended to include the new species.
A new circumscription for Lysinema ciliatum (Ericaceae: Styphelioideae: Epacrideae) and reinstatement of L. pentapetalum
THIELE, K.R., Nuytsia 19 (2): 265–275 (2009)
Lysinema ciliatum has long been regarded as a widespread and variable species. Occurring throughout much of the South-West Botanical Province of Western Australia on a variety of substrates, it is morphologically variable in foliar and floral characters, with up to eleven morphotypes informally recognised as putatively distinct taxa following a preliminary assessment in the early 1990s. Examination of material from throughout the species’ range shows that most of the currently recognised informal morphotypes comprise a single, variable species which cannot be adequately divided into taxa. A second, distinct species is restricted to the south coast of Western Australia, approximately between Albany and Esperance, with a disjunct outlier east of Perth. Comparison with types shows that the correct name for the widespread taxon is Lysinema pentapetalum R.Br., while the mostly southern-coastal taxon matches the type of L. ciliatum. Descriptions and distribution maps are provided for these taxa, and a key to all species of Lysinema provided.
Banksia recurvistylis (Proteaceae), a new species from Western Australia
THIELE, K.R., Nuytsia 19 (2): 277–281 (2009)
Banksia recurvistylis K.R.Thiele is described to accommodate anomalous populations previously referred to B. meganotia (A.S.George) A.R.Mast & K.R.Thiele. The new species differs from B. meganotia in its habit and flower and leaf dimensions, and is geographically disjunct. Both B. meganotia and B. recurvistylis have relatively restricted distributions and are of conservation significance.
Three new species of Hibbertia (Dilleniaceae) from Western Australia
THIELE, K.R., Nuytsia 19 (2): 283–293 (2009)
Three new species, Hibbertia leucocrossa K.R.Thiele, H. fasciculiflora K.R.Thiele and H. propinqua K.R.Thiele are described as new. All taxa occur north of Perth in the Lesueur Sandplains subregion of the Geraldton Sandplains bioregion in the South West Botanical Province, Western Australia. A revision of a key to the Hibbertia species of Western Australia is provided.
A new, rare Marianthus (Pittosporaceae) from the Bremer Range in Western Australia
WEGE, J.A. AND GIBSON, N., Nuytsia 19 (2): 295–302 (2009)
Marianthus aquilonaris N.Gibson & Wege, a new species allied to M. mollis (E.M.Benn.) L.Cayzer & Crisp, is described. Morphometric analysis shows that it is most readily differentiated from M. mollis by its higher leaf L:W ratio, higher petal L:W ratio and longer petioles. Other distinguishing features include a more erect habit, smooth and more or less glabrous leaves with attenuate rather than rounded bases , fewer pilose hairs on the stems, peduncles and fruit, and paler petals. Descriptions of both taxa are provided and include the first record of glandular trichomes for the genus. Marianthus aquilonaris is endemic to the Bremer Range and potentially threatened by mining-related activities. It is gazetted as Declared Rare Flora in Western Australia under the name M. sp. Bremer (N. Gibson & M. Lyons 1776).
Two new species of Hibbertia (Dilleniaceae) from near Ravensthorpe in Western Australia
WEGE, J.A. AND THIELE, K.R., Nuytsia 19 (2): 303–310 (2009)
Two new and geographically restricted species allied to H. hamulosa J.R.Wheeler and H. mucronata (Turcz.) Benth. are newly described. Hibbertia abyssa Wege & K.R.Thiele is distinctive for its long, slender and more or less glabrous peduncles, and sepals with both uncinate and minute stellate hairs on the outer surface. This species, which occurs on shallow soils with siltstone outcropping, is known from a single population adjacent to the nickel mine on Bandalup Hill and has recently been gazetted as Declared Rare Flora. Hibbertia atrichosepala Wege & K.R.Thiele is readily distinguished from allied species by its completely glabrous sepals. It is a narrow range endemic of rocky, lateritic habitats in in the Ravensthorpe Range and is listed as having Priority One conservation status.
Ptilotus luteolus, a new combination in Ptilotus (Amaranthaceae)
DAVIS, R.W., Nuytsia 19 (2): 311–312 (2009)
Benl has been the most prominent recent author on the genus Ptilotus R.Br., and described a number of infraspecific taxa from a small amount of material. Many new collections have now been made and it has become apparent that the ranking of these taxa is in need of review. After infraspecific taxa in Ptilotus astrolasius F.Muell. were examined it became apparent that Ptilotus astrolasius var. luteolus Benl & H.Eichler warrants the rank of species.
An interim key to the Western Australian tribes and genera of Myrtaceae
RYE, B.L., Nuytsia 19 (2): 313–323 (2009)
As an interim measure to permit identification of Western Australian genera, a status quo key is presented here. At the same time the opportunity is taken to key out the ten tribes represented in Western Australia.
