What is like dust; of the color of dust; as a dusty white. Dusty miller (Bot.), a plant (Cineraria maritima); -- so called because of the ashy-white coating of its leaves called?

dusty — Like dust; of the color of dust; as a dusty white. Dusty miller (Bot.), a plant (Cineraria maritima); -- so called because of the ashy-white coating of its leaves. (Webster's 1913.)

Sources