Trichocereus microspermus (Werderm. & Backeb.) Borg, Cacti, ed. 1: 141. 1937 Trichocereus microspermus (Werderm. & Backeb.) Borg, Cacti, ed. 1: 141. 1937is new combination for Cereus microspermus Werderm. & Backeb., Neue Kakteen: 80. 1931Taxon for this nameTrichocereus microspermus (Werderm. & Backeb.) Borg