Here's one I found in my "collectors edition" of Taste of Home. Untried by me.

Rinse violet blossoms well and place in a blender. Add 3/4 cup water and lim juice; blend well. Gradually add sugar, blending until a smooth paste is formed. In a saucepan, combine pectin and remaining water; bring to a boil and boil for 1 minute. Add to blender and blend for 1 minute. Quickly pour into prepared jars or glasses and sea.

*Be sure to use the common wild purple violet, not the African violet (often grown as a houseplant)