https://winterhardycacti.blogspot.com/2007/08/flowering-opuntia-tortispina.html
Winter Hardy Cacti: Flowering Opuntia tortispina - and other hardy succulents
Back in 2004 I ordered a batch of plants from Uhlig-Kakteen in Germany including two Opuntia tortispina (DJF 1139; west Albuquerque, New M...
opuntia tortispinaand otherwinterhardycacti