Riverine Plain Woodlands

Vegetation class map


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Key:
<1%
1-10%
10-50%
>50%
Estimated percentage landcover for vegetation class

Structure

Open Acacia woodland to 8 m tall, with sparse chenopod shrub stratum and continuous grassy ground stratum

Trees

Acacia pendula, rarely with Casuarina pauper, Eremophila mitchellii, Acacia oswaldii, A. stenophylla, Alectryon oleifolius ssp. elongatus

Shrubs and vines

Sclerolaena muricata, Muehlenbeckia florulenta and Rhagodia spinescens scattered throughout. Atriplex nummularia, A. vesicaria, A. semibaccata, Enchylaena tomentosa, Maireana aphylla, M. decalvans, M. pentagona, Chenopodium nitrariaceum are primarily in the south and generally in low densities there. Alectryon oleifolius and Acacia homalophylla scattered in the northern part of the range. Amyema quandang occurs on Acacia pendula throughout

Forbs, graminoids and pteridophytes

Sporobolus caroli, Eragrostis parviflora, Chloris truncata, C. acicularis, Austrostipa aristiglumis, A. nodosa, A. scabra var. falcata, Enteropogon acicularis, Sida corrugata, Centipeda cunninghamii, Einadia nutans, Alternanthera triandra, A. denticulata, Calotis scabiosifolia, Solanum esuriale, Ixiolaena leptolepis, Chamaesyce drummondii, Brachyscome curvicarpa, Rhodanthe corymbiflora, Myriocephalus rhizocephalus, Vittadinia cuneata var. cuneata, Isoetopsis graminifolia, Lepidium pseudo hyssopifolium, Wahlenbergia communis, Convolvulus erubescens, with Astrebla lappacea, A. pectinata and Dichanthium sericeum predominant in the northern part of the distribution, while Austrodanthonia setacea, A. caespitosa and Notodanthonia bipartita are common in the south

Habitat

Grey clays on gilgaied flats of the riverine plains, well removed from the drainage channels, in regions receiving 375-500 mm annual rainfall

Distribution

Eastern parts of the Murray-Darling riverine plains with a major occurrence in the mid western Riverina district and less extensive occurrences in the mid Lachlan, Macquarie and Moree plains districts. Principally found in NSW, but extends into Qld and Vic.

Notes

Grades into Central floodplain transition woodlands higher in the catenary sequence on its eastern margins and Riverine chenopod shrublands in lower rainfall areas of the south-western plains. Extensively cleared for pastoral uses. Many remaining areas heavily degraded by cutting of Acacia pendula for drought fodder, and by overgrazing, which has eliminated saltbushes, especially Atriplex spp., and other palatable plants. Extensive overgrazed areas in the Riverina now support simplified native grasslands.

Sources

Beadle (1948); Moore (1953); Biddiscombe (1963); Porteners (1993); Siversten & Metcalfe (1995, & unpubl., series 1-5); White (2001)

See all threatened species associated with this vegetation class

See a list of species, populations and ecological communities associated with the Riverine Plain Woodlands vegetation class.