Vivenna notices the Tears of Edgli here, the flowers that drive Hallandren wealth and trade. I added these in an early draft, as I realized that there needed to be a cheap, easy source for all of those dyes the Hallandren use. (This was pointed out to me by my friend Jeff Creer, I believe.) The Tears offer something else as well—a reason for the wealth of the people. In early times, dye trades were extremely lucrative, and being able to control a method by which unusual dyes could be created would have been a very good basis for an economy.
I also like what it does for the flavor of Hallandren as a whole. This story happens in the place that is, in most fantasy books, far away. A lot of fantasy novels like to make their setting someplace akin to rural England, and they'll talk of distant countries that have exotic spices, dyes, and trade goods.
Well, in this world, Hallandren is that place. It's at the other end of the silk road, so to speak.