Plants
Other Fresh Water Plants
Sighting 4461283

Alternanthera philoxeroides

Alligator Weed at Acton, ACT

Alternanthera philoxeroides at Acton, ACT - 29 Dec 2022 11:47 AM
Alternanthera philoxeroides at Acton, ACT - 29 Dec 2022 11:47 AM
Alternanthera philoxeroides at Acton, ACT - 29 Dec 2022 11:47 AM
Alternanthera philoxeroides at Acton, ACT - 29 Dec 2022 11:47 AM
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Identification history

Alternanthera philoxeroides 29 Dec 2022 RWPurdie

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Significant sighting

MichaelMulvaney noted:

30 Dec 2022

New recorded infestation of this major weed

User's notes

Small but dense infestation between edge of lake and dense reed-bed 2 m tall, growing in wet mud. Another larger infestation about 45 metres further along lake edge at 35 17 24.7 S, 149 06 55.3 E in similar habitat.

4 comments

MichaelMulvaney wrote:
   30 Dec 2022
@MichaelT I think this is one for the National Capital Authority - but can you please alert their weeds officer
MichaelT wrote:
   3 Jan 2023
Hi @MichaelMulvaney this site was mapped and treated with glyphosate on the 2/11/22 as can be seen on the Invasive plants dashboard (https://actgov.maps.arcgis.com/apps/dashboards/5449adb632884d68aeb585e3e73dde99) this chemical takes some time to have effect, so it probably won't have browned off yet.
MichaelMulvaney wrote:
   3 Jan 2023
Thanks Michael - great that you and your crew are one step ahead of me - will double check treatments in future
RWPurdie wrote:
   3 Jan 2023
Michael T: was a larger infestation about 45 metres further along the lake edge at 35 17 24.7 S, 149 06 55.3 E also treated on 2/11/22?

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Location information

Sighting information

Additional information

  • 30cm to 1 metre Plant height
  • True In flower

Species information

Record quality

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  • More than one media file
  • Verified by an expert moderator
  • Nearby sighting(s) of same species
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  • Additional attributes
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