Linaria vulgaris Mill., yellow toadflax, linaire vulgaire
Perennial, spreading by seeds and underground roots; allogamous;
flowering stems 6 inches to 2 feet (15 cm. to 6 dm.) high;
flowers irregular, yellow with a deep orange center; throughout;
grasslands, cultivated fields, gardens, roadsides, and waste
places; introduced from Europe and Asia.
Verbascum blattaria L., moth mullein, molène blattaire
Biennial, spreading by seeds; plants up to 6 feet (18 dm.) high;
flowers yellow, rarely white; southern Ontario, and southward in
the United States; old fields, roadsides, and waste places;
introduced from Europe.
Verbascum thapsus L., common mullein, grande molène
Biennial, spreading by seeds; autogamous; stems 6 inches to 8
feet (15 cm. to 24 dm.) high; flowers yellow; throughout, but
rare in mid-west; pastures, roadsides, and waste places;
introduced from Europe.