In a dreadful drought, I really don't have any business buying more plants, even drought-tolerant natives. But I couldn't resist; at the weekly local farmer's market, offerings from a small local native plant nursery (Carolina Wild) looked wonderful. There was wild quinine (Parthenium intregifolium), orange coneflower (Rudbeckia fulgida), grass-leaved golden aster (Pittyopsis graminifolia), broad-leaved tickseed (Coreopsis latifolia) and others equally tempting.
I ended up buying 11 small pots -- I'm planning to simply up-pot them and keep them watered until a (hopefully) decent fall planting time.