Ivesia rhypara
 Ivesia rhypara is a species of flowering plant in the rose family known by the common name grimy mousetail or grimy ivesia. It is native to Oregon and Nevada in the United States.This perennial herb grows from woody roots and a brancing caudex. It has hairy overlapping compound basal leaves and stems up to 15 centimeters long. At the ends of the stems are clustered white or pale yellow flowers. Blooming occurs in May through October.There are two varieties of this plant. The var.