New Zealand pygmy weed
New Zealand pygmy weed is a water-plant, growing in (aquatic form), around (emergent form) and even out of fresh water (terrestrial form). Pygmy weed looks very much like a houseplant/garden plant succulent (albeit with very small leaves!). Submerged, aquatic pygmy weed is the least easy to ID, though this is very useful! Leaves are fleshy and dense (particularly when pygmy weed emerges from the water) and leaves are not notched at the tips.
Pygmy weed grows rapidly, choking waterways and drainage channels, and may be present in faster-flowing water. Pygmy weed is present throughout the UK, particularly in the southeast of England, though it is moving north.
There have been no sightings of New Zealand pygmy weed yet!
Be the first! Read the description above — think you might have seen it? Snap it and send it (use our mobile app if you have a supported smartphone) — don't worry if you're not really sure; an expert will try and verify it by the picture.