Espostoa calva subsp. utcubambensis (G.J.Charles) Guiggi in Cactology 5 (Suppl. II): 1. 2016
Espostoa calva subsp. utcubambensis in Cactology 5 (Suppl. II): 1. 2016
is new combination for Espostoa utcubambensis in Brit. Cact. Succ. J. 21(2): 69–74, f. 1–10. 2003