Austrostipa, a new genus, and new names for the Australasian species formerly included in Stipa (Gramineae)

Jacobs, Surrey W. L.; Everett, Joy

doi:10.7751/telopea19963026

Cited by 40 publications

(58 citation statements)

References 16 publications

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“…Austrostipa . This genus was established by Jacobs and Everett (1996), including approximately 60 Australasian species, three of them introduced in America. Austrostipa is recognized by its florets, dark at maturity, tough in texture, often with brownish hairs, the lemma margins overlapping, and the callus long and pungent.…”

Section: An Update To Genera Of Stipeae Occurring In Americamentioning

confidence: 99%

Phylogeny of New World Stipeae (Poaceae): an evaluation of the monophyly of Aciachne and Amelichloa

et al. 2010

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© The Willi Hennig Society 2010. Abstract The tribe Stipeae, with nearly 550 species, includes 28 core genera, of which 13 occur in America: Achnatherum, Aciachne, Amelichloa, Anatherostipa, Hesperostipa, Jarava, Nassella, Ortachne, Oryzopsis, Pappostipa, Piptatherum, Piptochaetium and Ptilagrostis. Based on 37 species representing 14 Stipeae genera, and using four chloroplast markers and morphological characters, we provide a phylogenetic hypothesis of the New World Stipeae, with our focus on Amelichloa and Aciachne. Parsimony analyses included two approaches: (i) a multiple‐sequence alignment where gaps were treated as missing or coded, (ii) using direct sequences by direct optimization as implemented by the program POY v.4.0.2870. Analyses under direct optimization were conducted using the molecular data sets independently and combined, and with morphological data. Different cost regimes were explored and the one producing the highest congruence between partitions was chosen. Among the genera considered, only Piptochaetium, Austrostipa, and Hesperostipa were resolved as monophyletic, while Achnatherum, Amelichloa s.l., Anatherostipa, Jarava and Nassella were polyphyletic, and Aciachne was polyphyletic or paraphyletic. As a result, Amelichloa can be restricted to a monophyletic group if including A. brachychaeta, A. ambigua, A. clandestina and A. caudata, or it should be considered within Nassella. The phylogenetic position of species of Aciachne suggests inbreeding and outbreeding events with species of Anatherostipa, Ortachne and Hesperostipa.

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Section: An Update To Genera Of Stipeae Occurring In Americamentioning

confidence: 99%

Phylogeny of New World Stipeae (Poaceae): an evaluation of the monophyly of Aciachne and Amelichloa

et al. 2010

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“…Plants were identified to species wherever possible. Nomenclature follows Jessop and Toelken (1986), except for Austrostipa which follows Jacobs and Everett (1996) and Austrodanthonia which follows Linder (1997).…”

Section: Vegetation Samplingmentioning

confidence: 99%

Grazing exclusion as a conservation measure in a South Australian temperate native grassland

Souter

Milne

2009

Grassland Science

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Many of South Australia's remnant temperate native grasslands are degraded by introduced livestock grazing. As a conservation measure, grazing was excluded from three 50 × 50 m exclosures in grazed native grassland. After 4 years, grazing removal had a noticeable effect on the grassland structure, increasing basal vegetation cover. Grazing removal had no significant effect on either native or exotic species richness, rather differences in richness changed as a result of interannual differences, such as the amount of rainfall that fell in the growing season. The percent cover of the native tussock grass Austrostipa spp. and the introduced annual grass Avena barbata, whilst fluctuating from year to year, both increased following the removal of grazing. Multivariate analyses showed that whilst only interannual differences affected community taxon richness, changes in structure were affected by the interaction between grazing treatment and year. Excluding livestock from a degraded grassland resulted in limited recovery and restoration of these endangered plant associations will require active rehabilitation efforts.

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“…Other influences gave rise to pooid Austrofestuca (Tzvelev) Alexeev (1976) for A. littoralis whose generic placement had variously been Festuca, Schedonorus, Triodia, Arundo, and Poa; and to Austrostipa S.W.L Jacobs et J. Everett (1996), Stipeae; and to Australopyrum (Tzvelev) A.Love (1984), Hordeeae. We did not accept Austrodanthonia H.P.…”

Section: The Modern Period 1926-2000mentioning

confidence: 99%

History of the taxonomy of the New Zealand native grass flora

Connor

Edgar

2002

Journal of the Royal Society of New Zealand

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The New Zealand native grass flora comprises 187 species; the formal recognition of these grasses as worthy of taxonomic rank began with D. Solander's descriptions written in 1769-1770 during Cook's first voyage. The research of D. Solander, J. D. Hooker, J. Buchanan, T. Kirk, D. Petrie, E. Hackel, V. D. Zotov, and others in the history of taxonomy of the grass flora is analysed. Such an analysis is possible since the recent publication of our unified "Flora of New Zealand Vol. V Gramineae" (2000). Hooker in the 19th century and Petrie and Hackel into the 20th century emerge as the early dominant forces; Zotov and ourselves have added a significant number of taxa in the late 20th century. In 1853 Hooker warned of the possibility of Colonial systematic botanists describing an unduly large number of endemic species. We demonstrate that we have followed Hooker's proscriptive concepts despite a large increase in the number of taxa described in the last 40 years.

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Austrostipa, a new genus, and new names for the Australasian species formerly included in Stipa (Gramineae)

Abstract: 579

Cited by 40 publications

References 16 publications

Phylogeny of New World Stipeae (Poaceae): an evaluation of the monophyly of Aciachne and Amelichloa

Phylogeny of New World Stipeae (Poaceae): an evaluation of the monophyly of Aciachne and Amelichloa

Grazing exclusion as a conservation measure in a South Australian temperate native grassland

History of the taxonomy of the New Zealand native grass flora

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