Perennial herb to 2 m tall, virtually glabrous. Stems erect, winged, branched. Leaves lanceolate, to 12 cm long, to 4 cm wide, margins usually toothed, decurrent at base. Capitula in loose corymbs, to 5 cm across; summer to autumn. Ray florets yellow. Disk florets yellow.
Eastern Canada, USA
Source: (2002). Dahlia. In: . Horticultural Flora of South-eastern Australia. Volume 4. Flowering plants. Dicotyledons. Part 3. The identification of garden and cultivated plants. University of New South Wales Press.