Arthrocereus bylesianus (Andreae & Backeb.) Buxb. in Kakteen And. Sukk. 20: 97. 1969 Arthrocereus bylesianus (Andreae & Backeb.) Buxb. in Kakteen And. Sukk. 20: 97. 1969is new combination for Pygmaeocereus bylesianus Andreae & Backeb. in Natl. Cact. Succ. J. 12: 86. 1957Taxon for this nameArthrocereus bylesianus (Andreae & Backeb.) Buxb.