Alopecurus geniculatus
Marsh Foxtail at Jerangle, NSW
Identify this sighting
| Alopecurus geniculatus | natureguy | 13 Feb 2024 | |
| Alopecurus geniculatus | natureguy | 13 Feb 2024 | |
| Deyeuxia (genus) | Tapirlord | 29 Jan 2024 | |
| Unverified | JaneR | 29 Jan 2024 |
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User's notes
Completely unknown to me. Hopefully someone can build on these details and sort it out:
Habitat: wet soils at edge of small upland creek, silty.
Spike length: 3 to 4 cm,: narrow, 2 mm. Florets circular around rhachis, deciduous, leaving tiny peduncle.
Ligule is triangular, acute, to 4-5 mm long.
Glume: (can't see clearly with hand lens): possibly notched: with awn.
Lamina: up to 70 mm long, x 3 mm wide: linear-lanceolate.
9 comments
29 Jan 2024
I wondered about Deyeuxia spp but its ligule is described as truncate or obtuse.
Habitat for this grass was a wide open valley, no montane forest or even any trees at all.
Habitat for this grass was a wide open valley, no montane forest or even any trees at all.
31 Jan 2024
The PlantNet description for Deyeuxia carinata is "Leaves with ligule membranous, truncate, ciliate at apex, 5–6 mm long". I think this plant looks good for Deyeuxia.
31 Jan 2024
Sorry Jane. Somehow I interpreted your comment as you showing concern that the ligule is membranous. Was it the glumes or the lemmas that were awned?
1 Feb 2024
I haven't been successful in pulling a floret apart to see the flower parts clearly, points of attachment. Likely it is the lemma that is awned; but I haven't seen anything that I can confidently say are the glumes.
the overall length of the floret is 2-3 mm.
The edges of (glume or lemma - can't see clearly) are pilose.
The awn is about 3 mm long, angled away from floret (just visible in photo 3).
Although it does look like a Deyeuxia, I am still puzzled by the shape of the ligule which doesn't seem right for Deyeuxia: but shape is not a concern for you ? Second photo shows its length but not its shape.
the overall length of the floret is 2-3 mm.
The edges of (glume or lemma - can't see clearly) are pilose.
The awn is about 3 mm long, angled away from floret (just visible in photo 3).
Although it does look like a Deyeuxia, I am still puzzled by the shape of the ligule which doesn't seem right for Deyeuxia: but shape is not a concern for you ? Second photo shows its length but not its shape.
1 Feb 2024
I'm not familiar enough with Deyeuxia or most high country grasses to comment on the shape. I have samples of a few Deyeuxia so I can have a look later and compare.
13 Feb 2024
identified from live material as Alopecurus geniculatus at the National Herbarium this morning.
13 Feb 2024
Yes, disappointing it is an introduced species. Occurrence at this site ( in terms of elevation, region) seems to be a bit unusual. It wasn’t abundant, I noticed just one clump beside the river: more problematic for the river was the extensive dense Rorippa nasturtium-aquatica covering its surface.
Location information
- Coordinates 149.358231-35.860528
- Altitude 1103.2m
- Places Jerangle, NSW
Sighting information
- 16 - 100 Abundance
- 28 Jan 2024 04:42 PM Recorded on
- JaneR Recorded by
- 10cm to 30cm Plant height
- Yes In flower
Collections
Species information
- Alopecurus geniculatus Scientific name
- Marsh Foxtail Common name
- Not Sensitive
- Exotic
- Minor weed or pest
- 1103.15m Recorded at altitude
Record quality
Quality score
6 / 7
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- More than one media file
- Verified by an expert moderator
- GPS evidence of location
- Description
- Additional attributes
- Nearby sighting(s) of same species