Pediocactus simpsonii var. Nigrispinus.
I bought this tiny little golf ball sized plant at a NARGs winter study weekend probably 7 years ago...its approaching softball sized proportions now and has bloomed for many years. There is something so satisfying in seeing a ball cactus blooming in western Oregon. Usually home to perpetual dampness, rain and fog. Its 78 now, I'm seated by my wonderful specimen of p. Rockii enjoying the heavenly scent and looking forward to a weekend in the upper 80,s......too early to call it a draught but check back in august and I will update.