Claim: Verbascum blattaria is a biennial plant with leaves that develop as a basal rosette in its first year of growth.
Evidence: Verbascum blattaria, or moth mullein, is a flowering biennial herb belonging to the Scrophulariaceae (figwort) family. In its first year of growth, its leaves develop as a basal rosette. 
The moth mullein is a biennial plant. In its first year of growth, its leaves develop as a basal rosette. Verbascum blattaria is more commonly referred to as the moth mullein, so named because of the resemblance of its flowers' stamen to a moth's antennae.