6 Easy-Care Midwest Native Plants | Midwest LivingConeflower (Echinacea and Rudbeckia spp.) Blooms Striking purple, orange or pink petals decorate these daisylike prairie plants. Expect blooms all summer. Purple coneflower and orange coneflower are especially showy picks. Attracts Hummingbirds and butterflies feed on its nectar; goldfinches flock to its seeds.
Tough Strokes' Aster can withstand hot, humid weather. More plants for humid conditions: http://www.bhg.com/gardening/gardening-by-region/south/top-native-plants-for-southern-gardens/?socsrc=bhgpin062112#page=7
Yellow Columbine Among the most graceful Desert Southwest plants, yellow columbine is vigorous, heat-tolerant, and a lot tougher than it looks. The yellow flowers attract hummingbirds and butterflies and bloom almost continually if frequently deadheaded. Name: Aquilegia chrysantha Growing Conditions: Full sun and well-drained soil Size: To 3 feet tall Zones: 4-8