Just as hydrangeas come in many colors, watercolor comes in many forms.
We have talked mainly about watercolor crayons as that is my favorite form of the medium. If I had to choose one form that is what it would be as I can use them directly to rubber or scribble me out a palette of paints. The hydrangea was done in crayons and then the paint used to fill in the lighter areas. All of these stamps are from Inkadinkado.
Toni (A Spattering) used to do type recently ("SPRING")....simply beautiful! I don't normally like the "scratchy" look of watercolor crayons, but I love this idea! Water based crayons and dye stamp pads can both be used to create a watercolor look. Children's palettes like the ones that Crayola and Prang makes, work great. There are more expensive ones available and I do have one from Italy that I use, but in classes, I use Prang. Twinkling H20's is another water based paint you can use but they are going out of business, so if you need some, better hurry!
Let me know if you have any questions about any of these different forms of watercolor and I will be happy to answer and/or provide examples. Watercolor is one of the most flexible mediums so there are so many options!