The Lady Bird Johnson Wildflower Center in Austin, Texas can supply regional plant lists. The National Wildlife Federation has been running its excellent Backyard Wildlife Habitat campaign that will guide you with enhancing you backyard. Also, talk to native plant nurseries. Most are very happy to advise on all aspects of designing and planting enhancement schemes. Your city council may have plant experts who could assist or give you a list of local plants.
Native plants are best.
Local native plants are usually well adapted to your growing conditions and will thrive with minimum attention. They are also well adapted to supply nectar and pollen to native bees. Horticultural varieties and hybrids, in contrast, are not necessarily suited to local conditions, and are likely to have been bred to produce showy blooms at the expense of nectar or pollen production. In garden situations, non-native plants may be used where they will not threaten habitat areas. Many culinary herbs and older varieties of herbaceous plants are excellent bee and butterfly plants.