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

Figure 2: Unit 3. 5. There is much dead and fallen timber and remnant vegetation from prior to salt intrusion. A lot of bare areas are present or cover which consists of sClmphire such as I-Ialoscarcia species, and Tecticornia australiasica, Paspalidiu111 distans and SjJorobolus virginclls. Weed species may also be present including Malachra [asciata and Mimosa pigra . Upper coastal plain rarely inundated for long periods. Includes relic levees adjacent paleochannels typically 20 -30Clll above the general coastal plain, 2.41"11 - 3.11n AHD. 6. A mixed unit of herbs such as Merremia gel11mella, A1elochia corcor~rolia" Euphorbia vacllellii, PassUlora [oetida, Pit yllall t/z us urinaria, Malachra fasciata and Sesbania sp .. Also present are a variety of grasses and sedges including Pselldoraphis spinescells, Paspalwn scrobiclllatul11, Oryza rUfipogon, Panicul1l. sp. and Fimbristylis .spp. Upper coastal plain with elevation of 2.2n1 -2.7n1 AHD and medium to low salinity. 7. Sedgelancl dominated with Cyperus scarioslis. Associated species include Imperata cylin drica, A1erremia ge171ella, IsclzaenUlIll rllgoSUI11, Llldl1'igia pereT1T1i.s~ Pospallllll scrobiculatwll, PaniCllm. species, Passiflora [oetida, Pizyllantlllls nod~/7ora and C,.iTl1l111 allgulatlllll. Paleochannels, areas lying below 2.0111 AHD. Also includes former tributary creeks which feed into the paleochannels and previous buffalo 'swim' channels. 8. /-IymellaClllle aClitigluma, Leersia hexandra grassland with patches of deep water species such as Eleoclwris splwcelata, Ipomea aquatica, Lel7lna aeqllilloctialis, Lcuilvigia adscendens and NYl1lphoides violaceae.