After Édouard F.L. Raoul (1815–52), a French botanist.
Perennial herbs, often cushion- or mat-forming, usually hairy. Stems prostrate or ascending, rooting at nodes. Leaves along stems, usually alternate,margins entire, sessile. Capitula diskiform, terminal, solitary, with or without short stalks. Involucral bracts in several rows, overlapping, unequal, often white at apex. Receptacle flat. Outer florets female, filiform, few, yellow. Inner florets bisexual or functionally male, tubular, yellow. Achenes cylindrical, hairy. Pappus of slender, barbed bristles.
Prostrate habit; small crowded leaves; involucral bracts often coloured at tip.
11 species from New Zealand and New Guinea.
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.