| Elharveya visicularioides (H.A. Crum) H.A. Crum, 1986 |
| Horridohypnum W.R. Buck, 1981 |
| Horridohypnum mexicanum (Thér.) W.R. Buck, 1981 |
| Hypnaceae Schimp., 1856 |
| Hypnum Hedw., 1801 |
| Hypnum aduncum Hedw., 1801 |
| Hypnum albicans Hedw., 1801 |
| Hypnum amabile (Mitt.) Hampe, 1869 |
| Hypnum collinum Schleich. ex Müll. Hal., 1851 |
| Hypnum comtifolium Müll. Hal., 1874 |
| Hypnum cupressiforme Hedw., 1801 |
| Hypnum cupressiforme var. cupressiforme Hedw., 1801 |
| Hypnum cupressiforme var. lacunosum Brid., 1801 |
| Hypnum deplanatum Bruch & Schimp. ex Sull., 1848 |
| Hypnum filicinum Hedw., 1801 |
| Hypnum galipense Müll. Hal., 1848 |
| Hypnum humile P. Beauv., 1805 |
| Hypnum macrogynum Besch., 1892 |
| Hypnum oreganum Sull., 1849 |
| Hypnum polypterum (Mitt.) Broth., 1925 |