Sagittaria platyphylla

Sagittaria at Molonglo, ACT

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Identification history

Sagittaria platyphylla

5 Apr 2022

michaelb

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Significant sighting

MichaelMulvaney noted:

9 Apr 2022

Significant weed that we are trying to eradicate from the ACT

User's notes

Coombs Ponds.

9 comments

michaelb wrote:

5 Apr 2022

Reported previously but disappeared during drought. Now recovered. FYI @MichaelMulvaney.

JaneR wrote:

5 Apr 2022

looks like a young plant.
If possible, it would be worth digging up to see if it is a regrowth (from rhizome) or a regeneration from seed (in which case, likely to have very little belowground except roots).

michaelb wrote:

5 Apr 2022

It is not possible for me to do that. I'm leaving it to Michael M to have the rangers deal with it.

MichaelMulvaney wrote:

9 Apr 2022

Thanks Michael B - I have bene away but indicated to the @ACTParks-InvasivePlantsTeam that I would be away so hopefully they have followed up - If I don't here from them on Monday I will go and dig it up cheers

Michael M

michaelb wrote:

10 Apr 2022

Thanks Michael M.

MichaelMulvaney wrote:

11 Apr 2022

No contact from the Parks Invasive Species team, which was disappointing, but I removed 208 plants today (11 April 2022). I think there are more submerged plants but difficult to find them all will need ongoing surveillance. Plants in main water pond had seed pods and flowers but did not seem to have ripe seed. I removed all the flowering emergent forms of the plant. I understand the submerged rosette form of the plan can't produce flowers or seeds but can form rhizomes and corms. So a real hard one to eradicate

michaelb wrote:

12 Apr 2022

Thanks Michael M. I will check again in the future to see if there is regrowth.

MichaelMulvaney wrote:

12 Apr 2022

Thanks and I will need to find some waders or next time go in my swimmers

Cheers Michael

JaneR wrote:

12 Apr 2022

thats a huge effort, Michael M.
Am happy to help (and I have waders) if you do a repeat.
The third photo from MichaelB looks like the the plants are coming in down a drain ? (the propagules are adapted to dispersal by water, buoyant). So there must be an upstream source, and apparently vigorous.

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