Of all the crazy years to decide to bloom, my lemon verbena chose this year - the hottest summer on record and in the midst of a massive drought. I cut it back a bit in August because it was looking worse for the wear, and since then, it's put on a ton of new growth and has sprays of these fine, delicate white flowers coming from the tips of the branches. They have a nice generally floral aroma, and the native bees and flies seem to like them too.
Lemon verbena is a gangly shrub that seems to do right well in Central Texas. It's deciduous, loosing it's leaves in winter, and it's loose, arching form means that it's best placed behind other things.
People rave about using the leaves for tea, but I'm more of a black tea kinda guy. I use lemon verbena in place of lemongrass in Thai dishes, which seems to work well (though, I ought to plant some lemongrass, which also does well here with a little winter protection).
I've always heard that lemon verbena had nice little flowers. Welcome to the Grackle little flowers.