Rausch and Ritter are two explorers who played major roles in cataloging the South American cactus flora. With this species, one commemorates the other. Described more than 30 years ago, G. ritterianum is still uncommon in collections, but, like many of its genus, it is easily grown, has attractive discoid stems and freely-produces satiny white flowers with rosy throats. HBG 81065, second generation plants from Rausch 126, collected at 3250 m, near Famatina, La Rioja, Argentina. $5.
Published in the Cactus and Succulent Journal, Vol. 77 (2), March - April, 2005