Helianthocereus hyalacanthus (Speg.) Backeb., Cactaceae 2: 1333. 1959 Helianthocereus hyalacanthus (Speg.) Backeb., Cactaceae 2: 1333. 1959is new combination for Lobivia hyalacantha Speg. in Anales Soc. Ci. Argent. 99: 122. 1925Taxon for this nameHelianthocereus hyalacanthus (Speg.) Backeb.