| Hypnum clinocarpum Taylor, 1848 |
| Hypnum collinum Schleich. ex Müll. Hal., 1851 |
| Hypnum comtifolium Müll. Hal., 1874 |
| Hypnum conostegum Müll. Hal., 1851 |
| Hypnum contextum Hedw., 1801 |
| Hypnum crispatulum Hook., 1808 |
| Hypnum cultelliforme Sull., 1861 |
| Hypnum cupressiforme Hedw., 1801 |
| Hypnum cupressiforme var. cupressiforme Hedw., 1801 |
| Hypnum cupressiforme var. elatum Schimp., 1854 |
| Hypnum cupressiforme var. imbricatum Boulay, 1884 |
| Hypnum cupressiforme var. lacunosum Brid., 1801 |
| Hypnum cylindricarpum Müll. Hal., 1850 |
| Hypnum delicatulum Hedw., 1801 |
| Hypnum densum Sw. ex Hedw., 1801 |
| Hypnum deplanatulum Cardot, 1910 |
| Hypnum deplanatum Bruch & Schimp. ex Sull., 1848 |
| Hypnum desmiphorum P. Beauv., 1805 |
| Hypnum dicladum Müll. Hal., 1855 |
| Hypnum diminutivum Hampe, 1847 |