The article was first published in Echinopseen 8 (2) 2011.
The Mojocoya Valley is 35 km away from Presto, Bolivia. In 1988, Gianfranco Rovida found a beautiful Sulcorebutia here which is known today Sulcorebutia gemmae Mosti & Rovida, 2000. After Rovinda, Ralf Hillmann and the wife of Johan de Vries were the first to come to this valley. All populations found in the valley and in the mountans west and easrt from the valley belong to the S. gemmae certainly. Nevertheless, the Author with his wife found a population north form Redención Pampa, in 2001, which has dens spines and yellow flower in half of the population. North from Mojocoya, de Vries found a population (VZ205), which has been descibed as S. naunacaensis de Vries. In the ffots of Cerro Colata he found the Sulcorebutia elizabethae de Vries taxon. In 2005, Alessandro Gentili found a S. elisabethae-type plant among purple flowering Sulcorebutias. Finally, from the Eastern part of Presto, both S. tarabucoensis subsp. patriciae and S. gemmae are known. In the opinion of the Author, the territory is pretty small for so many different taxa similar in habit thus they may only varieties of S. gemmae.