Ipomoea ignava House Ipomoea ignava House in Ann. New York Acad. Sci. 18(6): 214. 1908 sec. Carranza 2008=Ipomoea maltratana Standl. in Publ. Field Mus. Nat. Hist., Bot. Ser. 22(1): 46. 1940 syn. sec. The Plant List 2013