| Name | Accession number | Synonym | Species | Habit | Locality |
|---|---|---|---|---|---|
| SIFNOS | TR.DR | S | GRC | ||
| SIFTA | AUS-1215 | TR.AE | |||
| SIGFUSSONS | AUS-1217 | TR.AE | CAN | ||
| SIGILTA | AUS-1218 | TR.AE | |||
| SIGLAWI-2 | TR.DR | SYR | |||
| SIGLO-TCL-21 | PI-613161 | CARACAL[2965][3692]; CTM-87-1801-2Y-0M-11RES-7M-1Y-0PAP-4Y-0B[2965]; CTM-87-1801[3692]; | TR.SE | S | MEX |
| SIGMA | LUTESCENS-311-00-22-5[1371]; | TR.AE | S | RUS:Omsk | |
| SIGMA,POL | K-61521 | TR.AE | S | POL | |
| SIGNADUR | TR.DR | S | AUT | ||
| SIGUS | TR.DR | S | DZA | ||
| SIGYN | MO-0186[221]; | TR.AE | W | NOR | |
| SIGYN-II | K-42667; NGB-473; PI-351581 | SYGYN-II[130]; SIGYN-2[541]; MO-0402[221]; | TR.AE | W | NOR |
| SIHA | K-50223; K-50232; K-50363; PI-177880 | TR.DR | S | TUR | |
| SIHANLI | K-50214 | TR.DR | S | TUR | |
| SIHONGHUAGUANGTOU | ZM-8197 | TR.AE | CHN:Sichuan | ||
| SIKA | B-2683[2964]; | TR.SE | S | MEX | |
| SIKA-26 | B-2683-26[2964]; | TR.SE | S | MEX | |
| SIKA-73 | TR.AE | S | MAR | ||
| SILA | 2935-k-11-1[3805]; | TR.AE | W | RUS:Krasnodar | |
| SILA,SER | NS-7075[4361]; | TR.AE | W | SER |