

Weingartia neocumingii was first described by C. Backeberg in Kakteen und andere Sukkulenten, 2: 2, in 1950. Since then, various authorities have included it in Gymnocalycium, Gymnorebutia, Rebutia, Neogymnantha, and Sulcorebutia and back to Weingartia.
Hentzschel and Augustin (2008) recognise two subspecies: W. neocumingii subsp. neocumingii and W. n. subp. pulquinensis. Within W. n. subsp. neocumingii they recognise two varieties: var. hediniana and var. longigibba. Within W. n. subsp. pulquinensis they recognise four varieties: var. augustinii, var. corroana, var. hentzscheliana and var. lagarpampensis.
Description to follow.
Plants of this species in the collection include:
Weingartia neocumingii red flowered form
Weingartia neocumingii subsp. neocumingii var. longigibba BK47
Weingartia neocumingii HJ1260
Weingartia neocumingii subsp. pulquinensis HS37
Weingartia neocumingii subsp. pulquinensis var. corroana HS38a
Weingartia neocumingii subsp. pulquinensis var. hentzscheliana HS37
Weingartia neocumingii subsp. neocumingii var. longigibba KK507
Weingartia neocumingii KK865
Weingartia neocumingii subsp. neocumingii var. longigibba KK867
Weingartia neocumingii subsp. neocumingii var. hediniana KK1308
Weingartia neocumingii MN434
Weingartia neocumingii subsp. neocumingii var. longigibba SO77
Weingartia neocumingii subsp. neocumingii var. hediniana W2687