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

On the lower coastal plain in areas which are wet for several months after the last rains. 29. A1elalellca lellcadelldra/ M.cajllPuti with mixed grassland similar to Unit 24 on coastal plain. Iiymenaclllle aClltiglllma, Nymplwea species, Oryza ru/ipogoll, Pselldorapllis spinescens, Ludlvigia adscendens and Eleocharis spllacelata. Fringing freshwater billabongs and channels. 30. Woodland comprising of Melalellca lellcadendra, Pandanus spira lis, IJarringtonia aClitallgula, and CatllormiuI11 umbellatum. Associated with Unit 12. Backwater swamps which often receive run off from nearby creeks and dry out for only a l110nth or two. 31. Melaleuca cajupllti and M.lellcadelldra forest with mixed grassland/ sedgeland which may include Hymenaclllle aClitigitul1a, Pseudoraphis spinescens, Eleocharis species, Cyperus species and Persicaria attenllatllm. Other associated woody species are Cathornlium ut11bellatum and Barringtonia acutangula. Upland areas on the floodplain which are not inundated by the wet season rains. 32. The woodland is a Inix of Melalellca viridijlora, M.lellcadendra, Eucalyptus papllalla, E.polycarpa, Ficlls vil'ells, Pandanus spiralis, Acacia allriculiformis, A.llolosericea. The lower strata will include Pseudoraplzis spinescens. 33. Vegetation cover varies from areas of woodland to grassland. The component species are Melalellca l'iridij1ora, Ficlls vil'ells, Acacia species, P.spillescells alld exotics sllclz as Malachra fasciata. Alluvial areas draining from upland country. 34. Woodland including Nallclea oriell ta lis, TimOflius timoll, Lil'istona belltllamii, Ficils vil'ells and an understorey of Pselldoraphis spillescells, Phyla llod~/lora, Nelsollia cafl1pestris, Caldellia procllmbells, Gymallthera oblollga and Pandanus spiralis, plus other monsoon vine forest species. The following occur on the upper alluvial plains whcih remain wet for less then 5 months of the year. 36. Grassland/Sedgeland of Eriachlle burkittii, Eragrostis cllmillgii, Pseudoraphis spillescells, Paspalum scrobiclllatlllll, CllIySOpOgoll latifotius plus a t11ixture of herbs and sedges. Alluvial floodouts with polygenetic soils. 37. Variable unit of predominantly open woodland of E. polycarpa, E. papuana, Acacia auricllliformis, Vitex glabrata and a mixed shrub layer. May merge with open forest of M. viridij1ora, A auriculiformis and Alltidesma gllaesembilla and sparse shrubs. '111e lower stratum is a mix of grasses, including EriacllllC bllrkittii, Pallicllm Sl'p., Echillochloa Cololllun, Eragrostis, and Cllrysopogoll latifotius. Swamp and water course species such