Morphological characteristics Leaves opposite, shortly stalked or stalked, lanceolate or oblong-lanceolate, 2.5–12 cm long, 0.4–4 cm wide, apex acuminate, base cuneate, margin with sharp saw, ciliate, densely covered with bristles Bristles, bristly bristles and glandular spots on vein below. Umbrella inflorescences axillary, with 6-10 flowers per turn; sepals lanceolate, marginate hairy; calyx bell-shaped, 5-toothed; corolla white, inconspicuously 2-lipped, upper lip suborbicular, lower lip 3-lobed, outside Glandular glands; corolla white, inconspicuously 2-lipped, upper lip suborbicular, lower lip 3-lobed, outside with glandular spots; anterior to stamens fertile, later degenerated into a rodlike stamen. Small nuts obovoid-shaped triangular prism. Flowering from June to September, fruiting period from August to October.