Distribution | Scientific Name | Synonym | Record | Image | Editor(s) |
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| Achnatherum saposhnikovii Poaceae | | | | |
| Achnatherum splendens Poaceae | Lasiagrostis splendens (Trin) Kunth acc. to: Grubov 1955, Grubov 1982/2001 Stipa splendens Trinius acc. to: Flora of China (Vol. 22, 2000)
| 17 records | | |
| Agrostis stolonifera Poaceae | | 4 records | | |
| Beckmannia syzigachne Poaceae | | 14 records | | |
| Blysmus sinocompressus Cyperaceae | | 18 records | | |
| Brachypodium sylvaticum Poaceae | Festuca sylvatica Hudson acc. to: Flora of China online
| 2 records | | |
| Bromopsis sibirica Poaceae | Bromus pumpellianus Scribn. acc. to: Grubov 1982
| 31 records | | |
| Bromus scoparius Poaceae | | 2 records | | |
| Bromus squarrosus Poaceae | | 1 record | | |
| Calamagrostis sajanensis Poaceae | | | | |
| Calamagrostis salina Poaceae | | | | |
| Carex sabulosa Cyperaceae | | | | |
| Carex sabynensis Cyperaceae | | 1 record | | |
| Carex sajanensis Cyperaceae | | 2 records | | |
| Carex saxatilis ssp. laxa Cyperaceae | | 3 records | | |
| Carex schmidtii Cyperaceae | | 5 records | | |
| Carex secalina Cyperaceae | C. eremopyroides V. Krecz. acc. to: Grubov 1982
| 4 records | | |
| Carex sedakowii Cyperaceae | | 7 records | | |
| Carex sempervirens Cyperaceae | C. stenocarpa Turcz. ex V. Krecz. acc. to: Grubov 1982, Gubanov 1996
| 12 records | | |
| Carex songorica Cyperaceae | | 6 records | | |
| Carex songorica ssp. gotoi Cyperaceae | | | | |
| Carex sordida Cyperaceae | C. drymophila Turcz. ex. Steudel acc. to: (Flora of Siberia, Vol. 3, 2001).
| | | |
| Carex stenophylloides Cyperaceae | C. stenophylla ssp. stenophylloides (V. Krecz.) Egor. acc. to: Flora of Siberia, Vol. 3, 2001
| 23 records | | |
| Carex supermascula Cyperaceae | | 1 record | | |
| Cleistogenes songorica Poaceae | | 31 records | | |
| Cleistogenes squarrosa Poaceae | | 33 records | | |
| Crypsis schoenoides Poaceae | Phleum schoenoides L. acc. to: Flora of China Heleochloa schoenoides (L.) Host. acc. to: Flora of China
| 2 records | | |
| Deschampsia sukatschewii Poaceae | | | | |
| Elymus schrenkianus Poaceae | | 2 records | | |
| Elymus schrenkianus ssp. pamiricus Poaceae | | | | |
| Elymus sibiricus Poaceae | | 24 records | | |
| Eriophorum scheuchzeri ssp. altaicum Cyperaceae | | 3 records | | |
| Festuca sibirica Poaceae | | 19 records | | |
| Glyceria spiculosa Poaceae | Scolochloa spiculosa F. Schmidt acc. to: Flora of China, Vol.22, 2006
| 1 record | | |
| Helictotrichon schellianum Poaceae | H. hookeri subsp. schellianum (Hackel) Tzvelev acc. to: Flora of China Vol.22, 2006
| 25 records | | |
| Juncus salsuginosus Juncaceae | | 15 records | | |
| Juncus soranthus Juncaceae | | | | |
| Kobresia sibirica Cyperaceae | | 3 records | | |
| Kobresia simpliciuscula Cyperaceae | | 13 records | | |
| Kobresia simpliciuscula ssp. subholarctica Cyperaceae | | | | |
| Kobresia smirnovii Cyperaceae | | 10 records | | |
| Leymus secalinus Poaceae | Elymus secalinus (Georgi) Bobr. acc. to: Grubov 1982
| 62 records | | |
| Luzula sibirica Juncaceae | | 17 records | | |
| Luzula spicata ssp. mongolica Juncaceae | | 8 records | | |
| Nardus stricta Poaceae | | | | |
| Piptatherum songaricum Poaceae | | | | |
| Poa schischkinii Poaceae | | 1 record | | |
| Poa sibirica Poaceae | | 21 records | | |
| Poa skvortzovii Poaceae | | | | |
| Poa smirnovii Poaceae | | | | |
| Poa stepposa Poaceae | | 15 records | | |
| Poa subfastigiata Poaceae | | 11 records | | |
| Poa supina Poaceae | | 3 records | | |
| Puccinellia schischkinii Poaceae | | 1 record | | |
| Scirpus supinus Cyperaceae | | 1 record | | |
| Sparganium stoloniferum Sparganiaceae | | | | |
| Spodiopogon sibiricus Poaceae | | | | |
| Stipa sareptana Poaceae | | 4 records | | |
| Stipa sibirica Poaceae | Achnatherum sibiricum (Linnaeus) Keng ex Tzvelev acc. to: Flora of China (Vol. 22, 2000)
| 42 records | | |
| Trisetum sibiricum Poaceae | | 48 records | | |
| Trisetum spicatum ssp. mongolicum Poaceae | | 2 records | | |
| Trisetum spicatum Poaceae | | 7 records | | |