Flora of New Zealand Series

Umbels us. compound, bracts us. ∞; calyx-teeth small or obsolete; petals white to red, notched, inflexed at apex. Fr. ± ovoid-cylindric. Mericarps convex; 5 primary ribs very slender, us. with double row of short spreading bristles; 4 secondary ribs prominent, with a row of conspicuous glochidiate bristles. Vittae under primary ridges. Annual to biennial tap-rooted herbs with few to many branches; lvs pinnately compound. About 60 spp., mostly of northern hemisphere.