OK, Rick, my hardy cactus collection consists of: Coryphantha macromeris and C. scheeri, Echinocereus coccineus var arizonicus, Echinocerus fendleri, Echinocerus reichenbachii var. perbellus (two variants, one dark spined, one light spined), Echinocereus x roetteri (two variants, one flowers pale pink with green at the base the petals, the other shell pink with orange shading inside), Echinocereus triglochidiatus var mojavensis, Eriosyce curvispina, Escobaria leei and E. sneedii, Gymnocalycium baldianum and G. bruchii, Maihuenia patagonia and M. poeppigii, Maihuenopsis ovata, Mammillaria heyderi var bullingtoniana, Opuntia imbricata var arborescens and O. phaeacantha, and Tunilla microdisea. Phew! Now my fingers ache.
For anyone interested in growing hardy cacti I recommend the following reference book: 'Cacti and Succulents for Cold Climates' by Leo J. Chance, published by Timber Press.
