

Weingartia (Sulcorebutia) purpurea was first described by J. Donald and A. B. Lau in Ashingtonia, 1(5): 53, in 1974.
Hentzschel and Augustin (2008) list two other varieties in addition to the nominate: W. p. var. santiaginiensis and W. p. var. unguispina. There is also a widely used varietal name “horacekii” which is sometimes regarded as a subspecies or species in its own right.
Description to follow.
Plants of this species in the collection include:
Weingartia purpurea var. santiaginiensis BLMT228
Weingartia purpurea var. santiaginiensis BLMT228a
Weingartia purpurea var. santiaginiensis BLMT228b
Weingartia purpurea var. unguispina BLMT230
Weingartia purpurea var. santiaginiensis EH7113a
Weingartia purpurea var. santiaginiensis EK7112
Weingartia purpurea var. santiaginiensis FK138
Weingartia purpurea var. santiaginiensis G66
Weingartia purpurea HS25
Weingartia purpurea HS25a
Weingartia purpurea var. santiaginiensis HS67
Weingartia purpurea var. santiaginiensis HS68
Weingartia purpurea var. santiaginiensis HS115a
Weingartia purpurea HS216
Weingartia purpurea var. santiaginiensis JD181
Weingartia purpurea var. santiaginiensis KR682
Weingartia purpurea L331a
Weingartia purpurea L332
Weingartia purpurea var. horacekii LH1250
Weingartia purpurea var. horacekii LH1256
Weingartia purpurea var. horacekii LH1493
Weingartia purpurea var. horacekii MS440
Weingartia purpurea PHA657
Weingartia purpurea PHA1589
Weingartia purpurea var. santiaginiensis RH400
Weingartia purpurea var. santiaginiensis RH403
Weingartia purpurea var. unguispina RH855
Weingartia purpurea ROS514
Weingartia purpurea var. santiaginiensis WF47