Acaena L.
Flowers in dense globular heads on long terminal peduncles. Calyx prickles 4, 6–10 mm long, nearly equal. Floral tube 4-angled. Leaflets orbicular to oblong, dentate. Stoloniferous herb. Widespread. Grasslands, forests and cleared areas Acaena novae-zelandiae
Flowers in long interrupted spikes or in heads with further flowers on the peduncle below the head. Tufted herbs without stolons (except sometimes in A. x anserovina)