Perennial herb forming mats or cushions to 1 m across. Stems prostrate, muchbranched. Leaves spoon-shaped, to 2 mm long, densely overlapping, silver-hairy towards apex. Capitula to 5 mm across; spring. Involucral bracts with a bright yellow spreading tip. Florets yellow. Achenes to 1mm long, almost glabrous.
New Zealand
R. hookeri Allan from New Zealand is a prostrate, mat-forming herb with small overlapping leaves and green or straw-coloured involucral bracts;
R. monroi Hook. f. from New Zealand is a prostrate mat-forming herb with small, distichously arranged, overlapping leaves and yellowish involucral bracts with a dark brown tip;
R. parkii Buchanan from New Zealand is a prostrate,mat-forming herb with small overlapping leaves and membranous involucral bracts with white spreading tips;
R. subsericea Hook. f. from New Zealand is a prostrate, mat-forming herb with the branch tips erect or ascending, small overlapping leaves and membranous involucral bracts with prominent white, spreading tips.
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.