Earlier chromosome counts for the species S. mougeotii (2n = 68), S. aucuparia (2n = 34) and S. cashmiriana (2n = 68) were confirmed.
Áður uppgefinn litningafjöldi tegundanna alpareynis (S. mougeotii, 2n = 68), ilmreynis (S. aucuparia, 2n = 34) og kasmírreynis (S. cashmiriana, 2n = 68) var staðfestur.