There are many varieties and shades of color in the Verbena family, wild and domesticated. Last fall I bought this plant on a close-out special and it has delighted me with these vibrant deep purple blossoms.
African Aloe have interesting coral colored trumpet flowers that hummingbirds enjoy. But the plants spread fast and their rosettes of leaves intertwine to form mats that are rather unattractive.
Goldeneye is a wildflower I planted in my garden a few years ago. It has formed into a small bush. Every Spring it delights me with it's sunny disposition.