The famous (or maybe infamous) PC cultivar.  This is the short name for "primary cultivar" or "predominant cultivar".   Either way, the PC is a beautiful, fast growing, short spined PC.  It looks great if allowed to grow into a specimen, but also makes for excellent rooting stock.  Most of our grafting stock uses PC for just this reason.
Sold as unrooted cuttings and inquiry for rooted plants.  If you live local in Southern California, inquire for larger and much larger potted and in gound plants that are all available for pickup.