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

Fringes deep swamps. 13. Pselldoraphis spillescells 111ixed Grassland/Herbland withA1arsilea mlltica, Pel'sicaria attellllatlllJl, J-Iygrochloa aquatica. Extensive areas approximately 2.5111 AHD which merges with lower plains of the previous units. 14. Mixed Grassland/Herbland of 01)7Za rujlpogoll, Eleocharis species, Phyla !lodi/lora, Pseudoraphis spill esc ellS, Echillochloa elliptica, E.colona, AeschYllol1lene illdica, Cyallqlis axillaris, Ivl arsllea IJllltica, !vI elochia corcllOri;jo!ia and Sesballia call1labilla. lHiJllosa pigra occurs in this unit. Fringing the floodplain and not inundated for an extensive period. 16. Dominated by Pseudoraphis spillesce!ls with scattered herbs stich as Alternallthera Jlod~flora. Mixed unit at approximately 2.5m AHD. 17. Vegetation is characterised by 111ixlure of sedges, grasses and herbs. The dominant species include Ischaeflllllll sp., Phyla nodi/lora, Ivlelochia corchor~/olia, Pallicllrn camb alld Ludwigia perrellsis. Also present are Fimbristylis species, AeschYllome indica, Cucu/JIis melo, Euphorbia vachellii, Sesballia callabilla and exotics such as JVlalaclzra fasciata, A1iJ1losa pigra, PassUlora ./()etida. On levees on the paleoestuarine plain which dry out early in the dry season. 18. Pseudoraphis spillesce/l.)' with Eriochloa procera and scattered herbs Caldellia procli/JIbellS, Iv/arsdellia /JIlitiea, Ivleloehia eorch~fo!i{f, J-IeliotropilLlJl illdieum and A Itenwllthera llodUlora. Chenier/beach ridge which are sandy wit.h shell fragments. Occurs along the top of the coastal plain these areas overlay bedrock and sandy sedil11ents or muddy sediments. Elevation is just above 2.0m AHD. 19. Vegetation cover is variable fro111 bare to Grassland with an open upper strata. Species include PselldoJ'apliis .s1)illeSeells, Eehinoehloa elliptiea, and Nlelalellca viridi/1ora. Else a weedy shrubland may occllr of Sida ~1)ecies, A;falacltra fasciata and Senna oblllsUo!ia. Mixed units at approximately 2.5m AHD. 20. Areas dominated by A1il110Sa pigra shrubland intermixed with Seclgeland/Grasslancl which may comprise of Hymellachlle aellfiglllma, Pseudoraphis spineseells, Cyperus searios[.{s, PassUlora foetida and klelaleuea eajllpufi. 21. AlJilllosa pigra shrublancl.