Haageocereus humifusus (Werderm. & Backeb.) Backeb. Haageocereus humifusus (Werderm. & Backeb.) Backeb.is new combination for Cereus versicolor var. humifusus Werderm. & Backeb., Neue Kakteen: 24. 1931Taxon for this nameHaageocereus humifusus (Werderm. & Backeb.) Backeb.