Mammillaria spinosissima var. castaneoides (Lem. ex Labour.) Borg, Cacti, ed. 1: 328. 1937 Mammillaria spinosissima var. castaneoides (Lem. ex Labour.) Borg, Cacti, ed. 1: 328. 1937is new combination for Mammillaria castaneoides Lem. ex Labour., Monogr. Cactaceae: 37. 1853Taxon for this nameMammillaria spinosissima var. castaneoides (Lem. ex Labour.) Borg