| Hypnum schreberi Willd. ex Brid., 1801 |
| Hypnum sebillei Renauld & Cardot, 1905 |
| Hypnum serpens Hedw., 1801 |
| Hypnum serrulatum Hedw., 1801 |
| Hypnum sinuolatum Kindb., 1897 |
| Hypnum siphotheca Müll. Hal., 1858 |
| Hypnum sommerfeltii Myrin, 1832 |
| Hypnum sordidum Müll. Hal., 1998 |
| Hypnum spiniforme Hedw., 1801 |
| Hypnum stoloniferum P. Beauv., 1805 |
| Hypnum subrusciforme Müll. Hal., 1874 |
| Hypnum subsimplex Hedw., 1801 |
| Hypnum tamarisci Sw., 1806 |
| Hypnum tamariscinum Hedw., 1801 |
| Hypnum tenax Hedw., 1801 |
| Hypnum tenerum Sw., 1806 |
| Hypnum tenuinerve Mitt., 1869 |
| Hypnum tequendamense Hampe, 1862 |
| Hypnum tetragonum Sw. ex Hedw., 1801 |
| Hypnum thelistegum Müll. Hal., 1851 |