Subspecies, varieties, forms and cultivars of plants belonging to the Echinocereus poselgeri group

• Echinocereus kroenleinii (Mich.Lange) W.Blum & Waldeis
• Echinocereus poselgeri Lem.: has tall and slender, dark coloured stems up to 1.2 m long and 2 cm in diameter.
  Flowers Pink Rose/Mauve Magenta. Distribution: West & South West USA (Texas) and Mexico (Coahuila, Nuevo Leon, Tamaulipas).
• Echinocereus poselgeri f. cristata hort.: Crested form.
• Echinocereus tamaulipensis (Werderm.) Mich.Lange
• Echinocereus tamaulipensis subs. deherdtii Mich.Lange
• Echinocereus tamaulipensis f. monstuosus hort.
• Echinocereus tuberosus Poselg. in Rümpler
• Echinocereus waldeisii Haugg: it forms only a single, slender-cylindrical stem, that can branch out in the age. Flowers terminal white. Distribution: Mexico: San Luis Potosi & Nuevo Leon.