Hygrophila difformis

Hygrophila difformis sometimes called Water wisteria is a very fast growing plant demanding very good light and lots of nutrients to get good green growth. The plants leaves change completely when grown out of the water, the very soft lobed leaves become smaller and serrated with lots of glandular hairs. The substance the glands give off seems to be toxic to some fish and you need to take great care when handling them as any damage seems to give off the toxin. Once they have been in the water a while the poison seems to disappear. The photos below show the plant when the leave have grown through the surface.

Hygrophila difformis Hygrophila difformis

http://www.aquariumplants.co.za