The National Capital Cactus and Succulent Society's (Washington, D.C. C&S Society) annual Plant Show will continue tomorrow, but here's my favorite plant for today. There was little doubt that it was also one of the visitors' favorites. Quite a few visitors were convinced this was artificial, green painted ping pong balls glued together. It's real alright, closely related to the opuntias and native to northern Argentina. The green, spheroid stems are analogous to the pads of the opuntias and the plant produces a new one on each arm each year. It is a neat and strange looking plant. One of the outstanding cacti of the show this year.