The HPT-numbers mentioned here are no field numbers of collected plants. They are internal numbers (acczession numbers, receipt numbers) of the cactus collection of  Hans-Peter Thomas which are used for identification of individual plant clones in our collections. This is important since Opuntioids normally are propagated vegetatively.
Where a site locality of the respective plant is known or where a locality can be followed, this is mentioned after the plant name and the HPT-number. Otherwise the plant is mentioned as a ‚cultivation clone‘.

darwinii 'darwinii', HPT 0383; cultivation clone

darwinii 'platyacantha', HPT 0245; cultivation clone

glomerata 'walterspielii', HPT 0247; cultivation clone

glomerata, HPT 0250; cultivation clone

glomerata, HPT 0254-6; Argentina, Prov. Mendoza, Dpto. Las Heras, north of Uspallata, 2100 m

glomerata, HPT 0577-2; Argentina, Prov. San Juan, Dpto. Iglesia, near Tocota, 2100 m - 2300 m

mandragora, HPT 0314; cultivation clone

mandragora, HPT 0627; cultivation clone

minuta, HPT 0187; Argentina, Prov. San Juan

minuta, HPT 0190; Argentina, Prov. San Juan

minuta, HPT 0192; cultivation clone

minuta, HPT 0193; cultivation clone

nigrispina, HPT 0260; cultivation clone

nigrispina, HPT 0579; cultivation clone

ovata, HPT 0183; Argentina, Prov. Mendoza, Dpto. Las Heras, 2000m

ovata, HPT 0246; received from cactus nursery Bleicher, Schwebheim, Germany