Sagittaria platyphylla

Sagittaria at Molonglo River Reserve

Sagittaria platyphylla at Molonglo River Reserve - 26 Jan 2018
Sagittaria platyphylla at Molonglo River Reserve - 26 Jan 2018
Sagittaria platyphylla at Molonglo River Reserve - 26 Jan 2018
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Identification history

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

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Significant sighting

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.
michaelb 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.
michaelb 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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  • 30cm to 1 metre Plant height

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