a shrub(Parthenium argentatum) of the southwest United States and Mexico whose sap was considered a potential source of natural rubber during World War II

• 银胶菊美国西南部和墨西哥的一种灌木（银胶菊属灰白银胶菊），其树液在第二次世界大战期间被认为是天然橡胶的潜在来源