The first description as
Mammillaria fasciculata by Benjamin Daydon Jackson was published in 1895. The epithet fasciculatus comes from Latin, means 'densely packed together' and refers to the cluster-forming reed-like shoots of the species. Wolfgang Blum and Michael Lange introduced the species as a subspecies to the species
Echinocereus engelmannii in 1998.
Nomenclature synonyms are
Cactus fasciculatus (Engelm. ex B.D.Jacks.) Kuntze (1891, nom. illegal ICBN article 53.1),
Neomammillaria fasciculata (Engelm. ex B.D.Jacks.) Britton & Rose (1923),
Echinocereus engelmannii subsp.
fasciculatus (Engelm. ex B.D.Jacks.) W.Blum & Mich.Lange (1998) and
Echinocereus fendleri var.
fasciculatus (Engelm. ex B.D.Jacks.) N.P.Taylor (1985). ==References==