Atriplex prostrata

Hastate Orache at Latham, ACT

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Identification history

Atriplex prostrata	18 Apr 2023	MichaelMulvaney
Atriplex prostrata	18 Apr 2023	pinnaCLE
Einadia trigonos	21 Mar 2023	Tapirlord
Rubus parvifolius	19 Mar 2023	CarbonAI
Rumex sagittatus	19 Mar 2023	natureguy
Unidentified	19 Mar 2023	pinnaCLE

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Significant sighting

MichaelMulvaney noted:

18 Apr 2023

New location and rare location of high risk weed - great to deal with it now before it comes widespread

User's notes

Growing at edge of flood zone Ginninderra Creek. Plant sprawling, with ribbed stems, quite branched, inflorescence spikes in upper leaf axils, fruit clusters have many pointed tips

11 comments

natureguy wrote:

19 Mar 2023

Quite a bad one if I am right and only a couple of prior ACT records so would be great to eradicate

natureguy wrote:

20 Mar 2023

@MichaelMulvaney what do you think about this one?

Mike wrote:

20 Mar 2023

Don’t know how @CarbonAI saw Rubus. Looks like Rumex.

CarbonAI wrote:

20 Mar 2023

It's a pleasure doing this job @Mike. If you don't agree with any of my suggestions, please help me improve by confirming the correct species.

pinnaCLE wrote:

21 Mar 2023

Thanks everyone, including CarbonAl.
It does look very Rumexy but I drew a blank when I used the Plantnet key for that genus. Leaf has petiole shorter than lamina, and fruit are sharp beaked, not rounded like the photos for R saggitatus in Plantnet. Leaves are probably more triangular than hastate, and habit is sprawling rather than climbing but that maybe from its open surroundings. I'll pop a sample to herbarium for ID.

Tapirlord wrote:

21 Mar 2023

I've seen turkey rubarb a few times down the coast and it has never had fruit like this. Based on the fruit I think it's likely to be in Chenopodiaceae and possibly Einadia trigonos.

Well worth taking it to the herbarium as I don't think there has been a formal collection of that species from the ACT.

natureguy wrote:

21 Mar 2023

Thanks Ciaran, I did wonder if the the fruit and shape of the leaves looked like Einadia, but leaf shape looks very large for that one to me. I don't know if Einadia trigonos is actually native to the ACT, or brought in from elsewhere? But seems like a good suggestions, thanks

MichaelMulvaney wrote:

21 Mar 2023

Thanks John - can you please keep us informed of Herbarium ID. It is definitely not Turkey Rhubarb, but seed head doesn't look right for Einandia - I first thought Fallopia convolvulus and then Emex australis but the seed head is not right for either of those - so I am at a loss.

pinnaCLE wrote:

18 Apr 2023

ID has come back from ANHerbarium botanist. Since it's exotic, I'll clear the 2 plants away.
ALA holds a nearby record and herbarium a preserved specimen from "northern side" of this creek in 2009 - dense sward CANB 782114.1

MichaelMulvaney wrote:

18 Apr 2023

Thanks John - yes a high risk weed - thanks for removing - much appreciated

pinnaCLE wrote:

17 Feb 2024

New plants noted this morning. I will return to remove them.

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Location information

Sighting information

2 Abundance
18 Mar 2023 09:00 AM Recorded on
pinnaCLE Recorded by
Collections
Significant sightings Plants Other Wildflowers & Herbs pinnaCLE

Additional information

30cm to 1 metre Plant height

Species information

Atriplex prostrata Scientific name
Hastate Orache Common name
Not Sensitive
Local native
Non-invasive or negligible
Up to 6.8m Recorded at altitude
Machine learning
In flower
External link More information

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Nearby sighting(s) of same species
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