Another interesting artist - Sylvia Edwards - who paints brightly coloured, imaginative watercolours. http://www.sylviaedwards.com/bio.html
I also have a large book filled with her striking watercolours - http://www.amazon.co.uk/exec/obidos/ASIN/0952998696/digitaltruthph08 - it's expensive but I got a cheap almost new copy for half the price.
This book features her work along with other artists - http://www.amazon.co.uk/exec/obidos/ASIN/1564964345/digitaltruthph08 - out of print but well worth reading.