22 replies to this topic

[Alexander Nijman]

Last Sunday we had an excursion to the Wannerheide near Cologne. And we did see Aldrovanda vesiculosa growing together with Utricularia australis in a concrete gutter! Very odd to see an extremely rare Aldrovanda growing happily in an concrete gutter! It was about 10 meter long by 2 meters wide. Well offcourse someone had introduced Aldrovanda in that gutter. That cutter was part of a former clening instalation for tanks when they where dirty after a day training in the field.

That Wannerheide was a former military training area. Now its a naturereserve fortunately. Well you also get the common stuff there like Drosera rotundifolia and D. intermedia, but not in that gutter. They where in some boggy area. With plants like Nartecium ossifragum and some Dactylhoriza maculata.

Alexander

[Random]

I had tested the water, it did seem pretty alkaline, actually. It had roughly 8 Ph at the beginning of the bog, it is supposedly more acidic deeper. Very strange, indeed.
Alexander, could you share some pics of the Wannerheide? :)

[Alexander Nijman]

An Ph of 8 is very high indeed for Aldrovanda. Those Aldrovanda in Bulgaia seem to have been reintroduced. There is a new good book on Aldrovanda from Adam Cross.

About the Aldrovanda of the Wahner Heide, I have found out that they are from the red Hungarian strain. I tried to dowload a picture but not working.

Alexander