Cuscuta verrucosa Engelm., Amer. J. Sci. 43:341. 1842 = Cuscuta glabrior Yuncker, Mem. Torrey Bot. Club 18: 140. 1932 Synonyms: Cuscuta verrucosa Engelm., Amer. J. Sci. 43:341. 1842 (nom. invalid., non Sweet 1823). Cuscuta arvensis var. verrucosa Engelm., Trans. Acad. Sci. St. Louis 1:495. 1859. Cuscuta pentagona Engelm. var. verrucosa (Engelm.) Yuncker, Illinois Biol. Monogr. 6:142. 1921. Lectotype (Yuncker 1921): U.S.A. TEXAS. No other locality, Drummond III 247 (MO; isolectotype: TEX). Engelmann described C. verrucosa and two varieties of it: var. hispidula (treated by us as C. indecora var. indecora) and var. glabrior. He cited collections associated with both varieties but none for C. verrucosa in its typical form. In 1859, in valid use of the epithet as C. arvensis var. verrucosa, he cited "Texas, Drummond! III. 247; Lindheimer! 127" and others as syntypes. Yuncker (1921, p. 52), under the combination C. pentagona var. verrucosa, indicated that "Drummond III 247" at MO was the type (lectotype).
