Pale Knotweed at Isaacs, ACT
Identification history
| Persicaria lapathifolia | 4 Dec 2024 | Mike | ||
| Persicaria sp. | 2 Dec 2024 | Tapirlord | ||
| Persicaria lapathifolia | 1 Dec 2024 | Mike |
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User's notes
In drying dam. Not yet fully grown.
7 comments
JaneR
wrote:
2 Dec 2024
@Tapirlord: With no flowers, no ochrea, and recognising that presence/absence of black spot is not a reliable diagnostic - there's not much to go on to ID down to species level ! My only comment is that, in my experience, Persicaria hydropiper seems to get going earlier. I have seen lots of seedings in the last few weeks and confirmed them as P. hydropiper by the taste test (tingling, peppery ). So I would suggest these are likely P. hydropiper - emphasis on "likely", as there is no supporting evidence.
Mike
wrote:
2 Dec 2024
I suggested Persicaria lapathifolia because that was the ID in https://canberra.naturemapr.org/sightings/4187382, though now I should check the ochrea and taste next time I am there.
Mike
wrote:
3 Dec 2024
Jane, I went back for the taste test: not peppery and not something I would put in a salad. I have added photos of the leaf sheath. Flora of the ACT says for Polygonum hypathifolium (now Persciaria hypathifolia) 'scarious stipular sheath truncate not ciliate' though the figure shows tapered sheath.
JaneR
wrote:
4 Dec 2024
Details of leaf base and ocrea make it clear this is Persicaria lapathifolia.
Nice photos.
Although familiar with Persicaria spp, but can't confirm as I am not a moderator for this group.
Over to you @Tapirlord
Nice photos.
Although familiar with Persicaria spp, but can't confirm as I am not a moderator for this group.
Over to you @Tapirlord
Mike
wrote:
4 Dec 2024
Thanks Jane. I am an area moderator so can confirm it. Just wanted to be sure.
Location information
- Coordinates 149.132270-35.387889
- Altitude 698.0m
- Maps Isaacs Ridge Isaacs Ridge and Nearby
- Places Isaacs, ACT
Sighting information
- 1,001 - 10,000 Abundance
- 3 Dec 2024 04:48 PM Recorded on
- Mike Recorded by
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Collections
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Additional information
- 30cm to 1 metre Plant height
Species information
- Persicaria lapathifolia Scientific name
- Pale Knotweed Common name
- Not Sensitive
- Local native
- Non-invasive or negligible
- Up to 1674.32m Recorded at altitude
- Machine learning
-
In flower
Record quality
- Overall Fit for scientific/research use
- Images or audio
- More than one media file
- Verified by an expert moderator
- Nearby sighting(s) of same species
- GPS evidence of location
- Description
- Additional attributes
