Floating Pennywort

Anyone use this aquatic pond herb?
I once stored an online book about the huge benefits gained from eating just a few leaves a day but it has somehow dissapeared from my saved list and i cannot find it now.
I would be very grateful of any information or experiences you have with this amazing plant as there is some growing wild near me and would like to add it to my culinary basket.
many thanks

I have heard about Gotu Kola. Apparently this is the same thing.

http://en.wikipedia.org/wiki/Pennywort

Other common names include Gotu Kola, Luei Gong Gen, Takip-kohol, Antanan, Pegagan, Pegaga, vallaarai

I believe that the OP is looking for info on Water pennywort, aka Floating pennywort.
It is a completely different species.

Here is some info:
(Be certain to save some, as the UK is banning its sale !)

http://www.bbc.co.uk/news/science-environment-21232108
http://www.illinoiswildflowers.info/wetland/plants/wt_pennywort.htm

Thanks to both of you

I have discovered it is hydrocotyle umbellata (dollarweed)or hydrocotyle ranunculoides(floating pennywort) There does seem to be quite a few different species of this herb. They all look pretty similar, though there are small differences. Although I can't remember which one I saved to favourites, At least I know now they are both edible, and one is a supermodel.

I was reading a good report on pennywort yesterday from a fishing forum. some pond keepers like this herb, it apparently grows rapidly, but pond life benefits well. But is a nuisance on waterways.

So this ban on sales has to do with the fact that it is intrusive.

I found this article about pennywort with video to differentiate between the varieties here;

http://lehighacresediblegardeningexchange.blogspot.co.uk/2011/06/dollarweed-pennywort-hydrocotyle.html

They taste quite peppery.....very yummy!