The Moth Mullein flashes its yellow or white search-lights this way and that, over the grassy seas of neglected pastures and fields, and along waysides, from June to November. They are singularly attractive, these large, wheel-like flowers, as they open one or two at a time, and for a day only. The tall, slender, round, and often hairy stalk is usually single, and grows from two to six feet high. The large, oblong, or lance - shaped leaf has a very irregular, double - toothed margin, and is seldom present during the flowering period. It is thin, smooth, stoutly ribbed and prominently veined. The arrangement is frequent and alternating, and the upper ones are partly heart - shaped and clasping. The flowers, which are either white or yellow, resemble those of the Great Mullein in structure. The white and yellow blossoms are borne on separate plants. They are lightly stained with purple. The five orange-tipped stamens are covered with fuzzy, purple hairs. The five-parted green calyx has slender, recurved tips. The flowers are set on short stems, and gathered in a very long, loose terminal spire. They are fragile, and easily drop from the calyx. The bud is flat and five-angled. This plant is said to be offensive to cockroaches. It is found from Quebec to Florida, and west to Kansas, Minnesota, and California.