Distribution of S. bogedaensis (red dots), S. involucrata (blue dots) and S. orgaadayi (green dots) in Mongolia, Russia and Chinese Tien-Shan Mts based on field surveys and herbarium materials as well as specimens from China based on the publications of Chen and Wang (2018) and Chen et al. (2019). Region numbers on the Mongolian map are phytogeographical regions according to Grubov (1982): 6 – Khovd, 7 – Mongolian Altai, 10 – Depression of Great Lakes and 14 – Dzungarian Gobi.