1 literature reference for Verbascum heterophyllum Velen.:

Author: Velen.
Year: 1891
Title:
Source: In: Abh. Boehm. Ges. Wiss. (1888) 21, in Nym. Consp. Fl. Fur. Suppl. 2: I.(1889) 229, et Fl. Bulg.