Submatucana calvescens (Kimnach & Hutchison) Backeb., Cactaceae 2: 1061. 1959 Submatucana calvescens (Kimnach & Hutchison) Backeb., Cactaceae 2: 1061. 1959is new combination for Borzicactus calvescens Kimnach & Hutchison in Cact. Succ. J. (Los Angeles) 29: 112. 1957Taxon for this nameSubmatucana calvescens (Kimnach & Hutchison) Backeb.