S. mamilliferum Juz. et Buk.
Lectotypus (Ovchinnikova et al. , 2009, Botanicheskii Zhurnal (Moscow & Leningrad), 94 (4), 2009 : 581-587): 1001 (8131), Peru, Cusco, Ppisacc, reproduced near Leningrad from number 4899/3415, leg.: S.Juzepczuk (WIR).