Subspecies, varieties, forms and cultivars of plants belonging to the Eriosyce crispa group

• Eriosyce crispa (F.Ritter) Katt.: Flattened to slightly cylindrical cactus, slowly growing up to 10 cm in diameter with showy pink blooms and long hairlike, contorted, thin black spines not easily distinguishable as centrals and radials.It is found only west of Freirina.
• Eriosyce crispa var. atroviridis (F.Ritter) Katt.: It has thick, needle-like spines and 12-14 radials. Distribution: it is fpund around Vallenar and Freirina.
• Eriosyce crispa var. carrizalensis (F.Ritter) Katt.: It has stiff, needle-like spines, 10-13 radials, and about 15 ribs. Distribution: It is found around Carrizal and Carrizal Bajo.
• Eriosyce crispa var. huascensis (F.Ritter) Katt.: It has stiff, needle-like spines, only 6-8 radials, and 10-12 ribs. Distribution: East of Huasco.
• Eriosyce crispa var. totoralensis (F.Ritter) Katt.: It has twisted spines and few ribs. Distribution: it is found near Copiapo and Totoral Bajo.