Astrophytum myriostigma var. tulense (K.Kayser) Borg, Cacti, ed. 1: 310. 1937 Astrophytum myriostigma var. tulense (K.Kayser) Borg, Cacti, ed. 1: 310. 1937is new combination for Astrophytum myriostigma subsp. tulense K.Kayser in Kakteen-Freund 1: 58. 1932Taxon for this nameAstrophytum myriostigma var. tulense (K.Kayser) Borg