The silver-leaf nightshade (Solanum elaeagnifolium) belongs to Solanaceae (the Nightshade family). It is a perennial herb that is distributed from the central and southern parts of the United States to Mexico. This herb grows in dry wastelands and can reach 30-75 cm in height. The whole plant is covered with small stellate hairs. The stems are erect, the leaves are broad linear to lanceolate and alternate, and the edges are entire or dentate. The pale bluish-purple flowers come on the tips of the branches from April to September. In Japan, naturalization was confirmed in 1950 in Yokosuka City, Kanagawa Prefecture. The Japanese name is a metaphor for the appearance of being covered with hair, like a woven fabric, "raxa".