Mazus 通泉草屬
型態特徵
Small annual, biennial or perennial herbs, often stoloniferous. Lower leaves opposite or rosulate, upper ones opposite or alternate, petiolate; blade simple, toothed or incised. Inflorescences terminal, more or less one-sided racemes, with solitary flowers in axils of reduced leaves or bracts. Pedicel short. Flowers purplish, bluish, or white, bracteolate; calyx cammpanulate, tube short, lobes 5, equal; corolla exceeding calyx, bilabiate; upper lip outside in bud, erect, 2-lobed; lower lip much larger, 3-lobed with 2 prominent ridges in throat; stamens 4, didynamous; filaments long, connivent; ovary 2-loculed, many-ovuled, stigma bilobed, lamellate. Fruit a loculicidal, 2-valved subglobose or compressed capsule, enclosed by persistent calyx. Seeds many, minute.
About 25 species in Asia, Hawaii, New Zealand, Australia and India; five species in Taiwan.
