Trailing St John’s-wort in the draw down zone of Colliford Lake Cornwall today. Other plants in the photo are Water Purslane, New Zealand Pygmyweed and a lone Corn Mint.
Hypericum humifusum
Hypericum humifusum
September 29, 2025 at 12:53 PM
Trailing St John’s-wort in the draw down zone of Colliford Lake Cornwall today. Other plants in the photo are Water Purslane, New Zealand Pygmyweed and a lone Corn Mint.
Hypericum humifusum
Hypericum humifusum
Shoreweed, New Zealand Pygmyweed and a tiny Many seeded Goosefoot at Siblyback Reservoir
September 23, 2025 at 8:57 PM
Shoreweed, New Zealand Pygmyweed and a tiny Many seeded Goosefoot at Siblyback Reservoir
🌿 Our next #InvasiveAlienSpecies is Crassula helmsii, the New Zealand Pygmyweed.
It can rapidly overgrow ponds through asexual reproduction and does not die back in winter.
🌱Due to its persistent growth, it outcompetes other plants for light and resources, potentially lowering water oxygenation.
It can rapidly overgrow ponds through asexual reproduction and does not die back in winter.
🌱Due to its persistent growth, it outcompetes other plants for light and resources, potentially lowering water oxygenation.
September 23, 2025 at 7:56 AM
🌿 Our next #InvasiveAlienSpecies is Crassula helmsii, the New Zealand Pygmyweed.
It can rapidly overgrow ponds through asexual reproduction and does not die back in winter.
🌱Due to its persistent growth, it outcompetes other plants for light and resources, potentially lowering water oxygenation.
It can rapidly overgrow ponds through asexual reproduction and does not die back in winter.
🌱Due to its persistent growth, it outcompetes other plants for light and resources, potentially lowering water oxygenation.
As you're into bees, I noticed that the invasive and much maligned New Zealand Pygmyweed was covered in bees today in the draw down zone at Siblyback. I didn't recognise the species but think they were solitary species of bee.
August 25, 2025 at 10:43 PM
As you're into bees, I noticed that the invasive and much maligned New Zealand Pygmyweed was covered in bees today in the draw down zone at Siblyback. I didn't recognise the species but think they were solitary species of bee.
The minute flower of New Zealand Pygmyweed. Swathes of it coating the draw down zone at Siblyback Reservoir Cornwall today, an invasive plant, though it had lots of solitary bees on the flowers.
Crassula helmsii
Crassula helmsii
August 25, 2025 at 7:57 PM
The minute flower of New Zealand Pygmyweed. Swathes of it coating the draw down zone at Siblyback Reservoir Cornwall today, an invasive plant, though it had lots of solitary bees on the flowers.
Crassula helmsii
Crassula helmsii
Two new species for me at New Lount NR today. Red Piercer on it's larval food plant, St John's Wort and New Zealand Pygmyweed smothering the ground on the edge of the main lake
June 11, 2025 at 3:19 PM
Two new species for me at New Lount NR today. Red Piercer on it's larval food plant, St John's Wort and New Zealand Pygmyweed smothering the ground on the edge of the main lake
The lake was carpeted with Stonewort, mainly, ?Opposite (Chara contraria) but also ? Fragile (C. globularis). There was quite a bit of the invasive alien Nuttall's Waterweed (Elodea nutallii) & more worryingly, some sprigs of New Zealand Pygmyweed (Crassula helmsii). @bramblebotanist.bsky.social 5/6
March 15, 2025 at 11:06 AM
The lake was carpeted with Stonewort, mainly, ?Opposite (Chara contraria) but also ? Fragile (C. globularis). There was quite a bit of the invasive alien Nuttall's Waterweed (Elodea nutallii) & more worryingly, some sprigs of New Zealand Pygmyweed (Crassula helmsii). @bramblebotanist.bsky.social 5/6
Came back home after going to my hometown for a few days for thanksgiving, and returned to this lovely beauty 🥺
It had been so sad looking and small when I left, even when I would give it some water before (I think it just needed a lot more). But ah! It looks like it perked and grew in a few days 🥹
It had been so sad looking and small when I left, even when I would give it some water before (I think it just needed a lot more). But ah! It looks like it perked and grew in a few days 🥹
December 2, 2024 at 2:21 PM
Came back home after going to my hometown for a few days for thanksgiving, and returned to this lovely beauty 🥺
It had been so sad looking and small when I left, even when I would give it some water before (I think it just needed a lot more). But ah! It looks like it perked and grew in a few days 🥹
It had been so sad looking and small when I left, even when I would give it some water before (I think it just needed a lot more). But ah! It looks like it perked and grew in a few days 🥹
More stormcast progress, but according to my phone I’ve successfully captured the essence of the Pygmyweed. It’s all I’ve ever wanted.
#aos #warhammer #pygmyweed
#aos #warhammer #pygmyweed
November 28, 2024 at 4:22 PM
More stormcast progress, but according to my phone I’ve successfully captured the essence of the Pygmyweed. It’s all I’ve ever wanted.
#aos #warhammer #pygmyweed
#aos #warhammer #pygmyweed
iPhone says “ ice plant” and “pygmyweed.” I don’t think so, but I do see sprouts.
January 23, 2024 at 4:51 PM
iPhone says “ ice plant” and “pygmyweed.” I don’t think so, but I do see sprouts.
New zealand pygmyweed #crassula at Hollingworth Lake, Rochdale #invasivespecies @freshwaterbio @alienseurope @SorayaAlvarez85
November 20, 2024 at 9:06 AM
New zealand pygmyweed #crassula at Hollingworth Lake, Rochdale #invasivespecies @freshwaterbio @alienseurope @SorayaAlvarez85
Q. What is the salinity level necessary to control New Zealand Pygmyweed Crassula helmsii?
A. 8 ppt
Cons Evid. http://bit.ly/1dageeL
A. 8 ppt
Cons Evid. http://bit.ly/1dageeL
- Conservation Evidence
bit.ly
December 6, 2024 at 10:58 AM
Q. What is the salinity level necessary to control New Zealand Pygmyweed Crassula helmsii?
A. 8 ppt
Cons Evid. http://bit.ly/1dageeL
A. 8 ppt
Cons Evid. http://bit.ly/1dageeL