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