The geranium is in the Pelargonium family. There are 422 different types of the geranium. It is originally an African plant. It tolerates the heat quite well, but don't fret if you forget to water it and it looks dead. Just pick off the old leaves and add water. As it is a perennial, it does go dormant in the Winter. My mother lets her's dry in a paper bag hanging upside down in her basement. In the Spring she adds some water and some "miracle grow". In a few weeks beautiful flowers are gracing her porch.
The scented variety are wonderful used in salads or desserts. There are hints of apple, lemon, mint or rose. Here is a recipe from Martha Stewart that uses the leaves to line a tea cake. Other fun recipes can be found on the Internet.