Sagittaria platyphylla

Sagittaria at Coombs, ACT

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Identification history

Sagittaria platyphylla	17 Feb 2020	MichaelMulvaney
Sagittaria platyphylla	17 Feb 2020	MichaelBedingfield
Alisma plantago-aquatica	30 Jan 2018	BettyDonWood
Alisma plantago-aquatica	30 Jan 2018	BettyDonWood
Unidentified	30 Jan 2018	MichaelBedingfield

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Significant sighting

MichaelMulvaney noted:

17 Feb 2020

Thanks for correcting my mis-identification Jane - a serious mistake as this is a plant with worrying high weed potential - would appreciate any further sightings

User's notes

In 2 locations on the edge of the Molonglo River below Coombs.

3 comments

JaneR wrote:

17 Feb 2020

this looks like Sagittaria platyphylla (WONS). the inflorescence is too robust and twisted to be Alisma plantago-aquatica. Occurrence on a river system is a worry.

MichaelBedingfield wrote:

17 Feb 2020

Thanks Jane.
Sagittaria platyphylla seems more likely. I had my doubts about the ID of Alisma plantago-aquatica at the time, but didn't know an alternative.

MichaelBedingfield wrote:

3 Mar 2020

I visited the site yesterday. At the point where I found the plant before, the river has split into 2 channels. The plant was found in the southern channel. The water was much deeper than when I found the plant, and if it is still present it would be under water.

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