Elderberry (scientific name: Sambucus williamsii Hance) is a deciduous shrub up to 4 meters high. The stem is edgeless, multi-branched, gray-brown, and hairless. The leaves are opposite, odd-pinnate and compound; the leaflets are ovate, elliptical or ovate-lanceolate, with a tapered apex, a broad wedge-shaped base, coarsely serrated edges, and hairless surfaces on both sides. The panicle is terminal, with coarsely serrated edges and hairless on both sides. The panicle is terminal, densely oval to oblong-ovate; the calyx is bell-shaped, with 5 lobes, and the lobes are tongue-shaped; the corolla is radial, with 45 lobes, and the lobes are obovate and light yellow; 5 stamens are attached to the corolla. , shorter than the corolla; one pistil, inferior ovary, short styles and bright red berries. The flowering period is from April to May, and the fruiting period is from July to September. Born on hillsides, shrubs, ditches, roadsides, houses and other places at an altitude of 540-1600 meters. Produced in Chinas Heilongjiang, Jilin, Liaoning, Hebei, Shanxi, Shaanxi, Gansu; Shandong, Jiangsu, Anhui, Zhejiang, Fujian, Henan, Hubei, Hunan, Guangdong, Guangxi, Sichuan, Guizhou and Yunnan provinces.
