Nepenthes ×atrosanguinea SynonymyNepenthes ×atrosanguinea B.S.Williams ex Anon. in Gard. Chron. n.s. 17: 826, fig. 125. 1882 sec. Anonymous 1882ContentHybrid parent formula Hybrid parent formula "a garden hybrid of American origin, probably a corss between N. sedeni and N. rubra"