Rostellularia procumbens Synonyms: Justicia procumbens. It is a slender, often tufted, prostrate or ascending, branched perennial herb. The stems are 10-40 cm long. The leaves are elliptic to oblong-ovate or ovate, 7-20 mm long, 5-20 mm wide, obtuse at both ends, and entire or slightly crenate as to margin. The flowers are pink, 6-7 mm long, and borne in terminal, rather dense, cylindric spikes 1-5 cm long and about 5 mm in diameter. The bracts and sepals are green, linear-lanceolate, and hairy. The fruit (capsule) is slightly hairy and about 4 mm long. One new lignan, rostellulin A ( 1), four known lignans, justin B ( 2), justicidin C ( 3), cilinaphthalide A ( 4), and justicidin A ( 5), and four known triterpenoids, ursolic acid ( 6), euscaphic acid ( 7), 2 alpha-hydroxyursolic acid ( 8), and tormentic acid ( 9), have been isolated from the whole plants of Rostellularia procumbens. Their structures were established on the basis of spectral data, including extensive NMR experiments.