Subspecies, varieties, forms and cultivars of plants belonging to the Opuntia engelmannii group

• Opuntia engelmannii Salm-Dyck ex Engelm.: (var. engelmannii) Spines chalky white, yellow when wetted, with dark red-brown extreme bases.
• Opuntia engelmannii subs. aciculata (Griffiths) U.Guzmán & Mandujano: has numerous, 3-12 mm long, acicular, spreading, glochids forming a dense cluster, golden yellow from all part of the areoles, persisting for several years. Distribution: South-western USA (Texas ), north-western Mexico.
• Opuntia engelmannii var. cuija Griffiths: endemic to Mexico, in Guanajuato, Hidalgo, San Luis Potos
• Opuntia engelmannii var. cyclodes Engelm. & J.M.Bigelow
• Opuntia engelmannii var. dulcis (Engelm.) J.M.Coult. ex K.Schum.
• Opuntia engelmannii var. flavescens (Peebles) L.D.Benson
• Opuntia engelmannii var. flavispina (L.D.Benson) B.D.Parfitt & Pinkava: Spines arching downward near bases. South-central Arizona.
• Opuntia engelmannii var. flexospina (Griffiths) B.D.Parfitt & Pinkava: Spines strongly deflexed. South Texas.
• Opuntia engelmannii subs. lindheimeri (Engelm.) U.Guzmán & Mandujano: Stem segments with spines straight or slightly curving, spreading. It is endemic to U.S. in Louisiana, New Mexico, Oklahoma, Texas.
• Opuntia engelmannii subs. lindheimeri cv. Gomei: the segments are often scalloped, wavy at margins and more or leas raised at areoles. Origin: near the coast of southern texas, USA.
• Opuntia engelmannii var. linguiformis (Griffiths) B.D.Parfitt & Pinkava: Stem segments becoming very elongate, 2+ times longer than wide, lanceolate to linear-lanceolate, often falcate. Distribution: Texas.