Flora of New Zealand Series

Fls 4-5-merous, in terminal dichotomous cymes; calyx-lobes sts keeled or winged, corolla-tube cylindric, lobes yellow, contorted in bud. Stamens at throat or on tube of corolla, filaments short; anthers introrse. Ovary 2-loculed, placentae large; style filiform, stigma clavate or capitate. Capsule ± globose, septicidally 2-valved. Seeds ∞, minute, testa reticulate. Erect glab. annual herbs of wide distribution in Old World, with opp. sessile lvs. Some 100 spp., the N.Z. sp. also in Australia, Tasmania.