Territory Stories

Mary River Floodplain Vegetation



Mary River Floodplain Vegetation


Lynch, D; Northern Territory. Department of Lands, Planning and Environment. Resource Capability Assessment Branch


E-Publications; E-Books; PublicationNT; Technical Report No. 08/2015




Mary River


The Mary River Flood Plains are approximately 100km east of Darwin and have a catchment area of about 7700 kn12 (Woodroffe 1993). The headwaters are approximately 18Skm inland. The southeast corner of the catchment includes Coronet Hill and a sandstone/siltstone plateau. Further to the south west in the Pine Creek region are undulating to rolling hills (includes strike ridges) of greywacke, sandstone and siltstone. The west side of the catchment includes undulating to rolling granite rises with some rugged hills. The McKinlay River joins the Mary River just south of the Arnhem Highway. From here the river divides into a series of streams and billabongs which are only connected in the Wet season.


Please replace the current item on the system with this report. This is the original report, produced in 1996 by the then Department of Lands, Planning and Environment. The report was resubmitted in order that it could be correctly filed with a Technical report number.

Table of contents

Introduction -- Climate -- Vegetation -- Method -- References




Floodplains -- Northern Territory -- Mary River; Vegetation surveys -- Northern Territory -- Mary River Region; Floodplain plants -- Northern Territory -- Mary River Region; Mary River Floodplain Vegetation

Publisher name

Northern Territory Government

Place of publication



Technical Report No. 08/2015


1 volume (no pagings) : illustrations (some col.), maps ; 30 cm.

File type



Attribution International 4.0 (CC BY 4.0)

Copyright owner

Northern Territory Government



Parent handle


Citation address


Page content

22. Occasional woodland dominated by Melalellca cajuputi and/or A1. viridiflora which opens out to a grassland or shrubland. The ground cover is a mix of species Eriochloa procera, Pa.s1Jallltn scrobiculatul11, Phyllanthlls llodif7ora, ft.!lalachra fasciata, Sesballia sp. and Fimbristylis species. Nlilllosa pigra forms a weedy shrubland. Associated with Unit 17. 23. Allelalel/ca Regeneration. Coastal plain and paleoestuarine plain with an elavation of less than 2.0n1 AHD. May remain wet for several month beyond the wet season. 24. A1elalellca cajupllti closed/open forest with mixed grassland understorey. flymellachlle acutigllllJla, Leershl hexandra, Oryza J'UflpOgOIl. Other species include Eleocharis specie.')~ Ludwigia adscelldells, Lemlla aequilloctalis and Polygollllln attenuatum .. 25. A A1e1alellca cajllputi open forest/woodland with mixed grassland understorey. J-lYlllellac/lIle aClitiglullla, Leersia hexalldra, Oryza J'l~/lpOgOIl. The woodland tends to occllr as patches scattered across the grassland. Other species include Eleocharis species, Ludwigia adscendells, Lenllw aequilloctalis and Polygol1um altellllatUfJl. fnland coastal plain with an elevation of 1.93 -1.96m AHD. Some areas are adjacent or subject to salt water intrusion. 26. tHe/alellcll crziuputi open woodland with M. leucadelldra. The lower strata consisits of an Eleocltaris dlilcis Sedgeland. Other species include Azolla pillllata, ft.!lollochoria vagill a lis, Oryza rujlpogoll, Pselldoraphis spillescells, Naja tenuUolillm, Nymphea violaceae and Llldwigia adscelldells. 15 (26a) Areas previously salt intruded and are now regenerating Plains with intermediate water depths. 27. Aif. cajupllti, NI. virid~/lora woodland with Oryza 1'l~/lpOgOIl and Eleocharis mixed grassland/sedgeJand. Also includes Pseudoraphis spillescells, AechYllornelle species Persicaria barbata, Phyllallthus Ilodiflora and Sesballia .species, iVlilJlosa pigra. Fringing the clay plains with variable soils. 28. ft.!1.lelicadeJlt/ra, NI. viridi/lora forest with a n1 ixed grassland. ft.!l. nerVOSllln may also occur. The grassland is dominated by Pseudoraphis spillescens and other species found are Eragrostis CllJllillgif, Ectrosia agrostoides, Eriac/tlle bllrkitti, Pallicum 111illdallaellse, P.scrobiculatllJJ1, Phyla Ilod~flora, Alternanthera Jlod~/lora, Alliseia lJIartinicensis and J-leliolropilllll illdiclllll .. Some areas are invaded by Aifimosa pigra.