Plants 10–40(–75) cm. Leaves: basal blades lanceolate, (3–)6–7 cm × 8–20(–30+) mm; cauline blades lance-elliptic to lance-linear, 2–5+ cm × 5–12(–20+) mm, bases ± cordate, clasping, margins entire or serrulate (abaxial faces usually villous, adaxial sparsely strigillose to glabrate). Involucres 7–9(–15) mm diam . Outer phyllaries lance-linear, 4–6 × 0.5–0.8 mm (bases sericeous); inner phyllaries similar, more scarious. Ray florets 40–70+; corolla laminae 10–15+ mm. Disc corollas 4–6 mm. Cypselae 1–1.5 mm, puberulent or glabrate; pappi of 15–25 distinct or basally connate bristles 4–6 mm. 2n = 32.

Flowering mid–late summer. Roadsides, waste places; introduced; Ont., Que.; N.Y.; Europe.

Inula britannica is probably an occasional escape from garden trash and not truly established in the flora.