| Sieglingia sesleroides var. intermedia Vasey ex L.H. Dewey, 1894 |
| Sieglingia spicata (Nees) Kuntze ex Stuck., 1904 |
| Sieglingia texana (S. Watson) Kuntze, 1891 |
| Sieglingia wrightii Vasey, 1893 |
| Sinoarundinaria Ohwi, 1931 |
| Sitanion Raf., 1819 |
| Sitanion (Raf.) Benth. & Hook. f., 1883 |
| Sitanion albescens Elmer, 1903 |
| Sitanion basalticola Piper, 1903 |
| Sitanion brevifolium J.G. Sm., 1899 |
| Sitanion brodiei Piper, 1899 |
| Sitanion caespitosum J.G. Sm., 1899 |
| Sitanion ciliatum Elmer, 1903 |
| Sitanion cinereum J.G. Sm., 1899 |
| Sitanion elymoides Raf., 1819 |
| Sitanion glabrum J.G. Sm., 1899 |
| Sitanion hystrix (Nutt.) J.G. Sm., 1899 |
| Sitanion insulare J.G. Sm., 1899 |
| Sitanion jubatum J.G. Sm., 1899 |
| Sitanion latifolium Piper, 1899 |