Mazus

Perennial (in Victoria) rhizomatous herbs, minutely gland-dotted. Leaves opposite but often forming basal rosettes. Flowers 1–several, alternately arranged on a scape or (not in Victoria) in terminal racemes; bracts and bracteoles small, sometimes absent; bracteoles alternate on the pedicel well below calyx. Sepals 5, fused for varying lengths, finely ribbed; corolla 2-lipped, tube symmetrical at base, upper lip pointed outwards, emarginate, lower lip longer, broad, spreading, 3-lobed, with a palate of 2 longitudinal raised ridges covered with clavate hairs; stamens 4, in pairs of unequal length, filaments without spurs, anthers of each pair joined, borne under the upper lip, with 2 confluent but widely divergent locules separated by a distinct but incomplete septum, staminodes absent; stigma with 2 irritable broad equal flaps. Capsule loculicidal, 2 valves entire, or possibly indehiscent; seeds many, not winged, reticulate.