Perennials. Stems branched, 5–9 dm, glabrous. Leaves: petiole 3–30 mm; blade lanceolate, 30–130 x 5–87 mm, margins proximally serrate to pinnatifid, distal 1/4–1/2 entire, surfaces glabrous. Bracts lanceolate, 15–36 x 6–7 mm, margins entire. Pedicels 11–23 mm, sparsely villous to puberulent. Flowers: calyx glabrous or sparsely pubescent, tube campanulate, 3–5 mm, lobes lanceolate, 7–9 x 1–2 mm, margins entire; corolla tube 18–27 mm, glabrous, lobes 11–12 x 10–13 mm; filaments 15–28 mm, glabrous or ciliate; style 25–30 mm. Capsules ovoid to pyriform, 10–11 x 5–10 mm, glabrous.
Phenology: Flowering Aug–Oct.
Habitat: Limestone substrates, edges of lakes or streams.
Elevation: 200–300 m.
Ala., Ga., Ky., Tenn.
Aureolaria patula is poorly known and has the most restricted distribution within Aureolaria. Little information is available, and few specimens exist. It is state-listed as threatened in Tennessee and of special concern in Kentucky.