Persicaria lapathifolia
Pale Knotweed at Isaacs, ACT
Identify this sighting
| Persicaria lapathifolia | Mike | 4 Dec 2024 | |
| Persicaria (genus) | Tapirlord | 2 Dec 2024 | |
| Persicaria lapathifolia | Mike | 1 Dec 2024 |
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User's notes
In drying dam. Not yet fully grown.
7 comments
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.
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.
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.
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
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
- 30cm to 1 metre Plant height
Collections
- Mike Canberra & Southern Tablelands NatureMapr Persicaria lapathifolia Other Wildflowers & Herbs Plants
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
Seasonal activity
-
In flower
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Record quality
Quality score
7 / 7
- 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