Subspecies, varieties, forms and cultivars of plants belonging to the Pachycereus schottii group

• Pachycereus schottii (Engelm.) D.R.Hunt: (var. schottii ) has relatively thick stems with fewer (5-6) stem ribs, and and trunk-less habit with numerous, ascending, columnar stems in a candelabra-like arrangement. Distribution: northern part of the range (southwestern Arizona to the Guaymas region and inland to Hermosillo, also Baja California to northern Baja California Sur.)
• Pachycereus schottii f. cristatus: This is a highly priced crested form for its sculptural shape. There are indeed other crested clones that have a tendency to fan out, some will form stable crests while others just cluster over one another.
• Pachycereus schottii f. mieckleyanus (Weing.) P.V.Heath: This monstros form has thinner stems with less tubercles. Stems are ascending but not straight with irregular bumps, slim, lightly pruinose, and also branch just from the base and occasionally at higher levels
• Pachycereus schottii f. monstrosus (H.E.Gates) P.V.Heath: Mutation with variable, irregularly shaped ribs with raised, tubercle-like, knobby-looking swellings along the stems, and few (if any) spines or bristles.
• Pachycereus schottii var. tenuis (G.E.Linds.) P.V.Heath: usually forms a short trunk, has more slender stems with 6-10 ribs, and is shrub sized. Distribution: Sonora, northwestern Sinaloa, and Baja California Sur.
• Pachycereus schottii cv. Big Penis Cactus: is a controversial monstrous cactus species with smooth rib-less stems, dubiously thought of as a mutant Lophocereus schottii and remembering of a large-sized Echinopsis bridgesii f. monstruosa (Long joined type).