I seen one potted-plant in a farmhouse above this valley (was it the source?) of M'Forn. When I arrived down the valley bed, it was full of Nasturtium. I walked 1km along and could still see scattered plants here and there.
The pics speaks for themselves.
The seeds are able to float in water and germinates readily a soon as they touch ground when the temp gets warmer (typ February).
Hope there are no more fans of this plant regarding its spread in valleys.
- This stretch was 120m long and up to 1km, there were scatters plant of Nasturtium.
- NastutiumSpread3.JPG (465.46 KiB) Viewed 50047 times
- The Maltese flora is below
- NastutiumSpread2.JPG (265.71 KiB) Viewed 50048 times
- Large populations of Tropaeolum majus with their large umprella like leaves.
- NastutiumSpread1.JPG (209.35 KiB) Viewed 50048 times
Let's hope so anyway. Consolation, it is easy to control this, no perennial root structures and oftentimes a single plant covers a large area so the problem is smaller than it appears to be.
What worries me was not the populations at that putrid water in the 3rd photo (pollution in action ) but the fact that it is carried away into the heart of the countryside (where the valley was smaller, a humble spring I would say) 1km or so from the source and would take over there and propgate further in.
Well I posted this to make authoriteis aware what's happening in certain valleys perhaps they deem tha action should be taken.
Here's an interesting link - again from Wikipedia -
Environment nil: Tropaeolum 10 !