Moth Mullein: Verbascum blattaria - Raceme loose. Leaves and stems glabrous below, densely covered with gland-tipped hairs above.
Common Mullein, Cowboy Toilet Paper, Flannel Mullein, Great Mullein: Verbascum thapsus (Synonym: Verbascum thapsus var. thapsus) - Raceme dense. Leaves and stems densely white-woolly with non-glandular hairs.