| Ephemeraceae | |
Ephemerum serratum var. angustifolium
| (Bruch & Schimp.) Bruch & Schimp. | Bryol. Eur. 1: 9. 1 (fasc. 42 Mon. 5. 1) | 1849 |
| Ephemeraceae | |
Ephemerum serratum subsp. intermedium
| (Mitt.) Dixon | Stud. Handb. Brit. Mosses 269 | 1896 |
| Ephemeraceae | * |
Ephemerum serratum var. intermedium
| (Mitt.) Husn. | Muscol. Gall. 208 | 1888 |
| Ephemeraceae | * |
Ephemerum serratum var. longifolium
| Mönk. | Laubm. Eur. 383, 84c | 1927 |
| Ephemeraceae | |
Ephemerum serratum var. medium
| I. Hagen | Kongel. Norske Vidensk. Selsk. Skr. (Trondheim) 1908(9): 34 | 1909 |
| Ephemeraceae | |
Ephemerum serratum var. minutissimum
| (Lindb.) Grout | Moss Fl. N. Amer. 2: 68 | 1935 |
| Ephemeraceae | * |
Ephemerum serratum subsp. praecox
| (A.W.H. Walther & Molendo) Kindb. | Eur. N. Amer. Bryin. 2: 400 | 1897 [1898] |
| Ephemeraceae | |
Ephemerum serratum var. praecox
| A.W.H. Walther & Molendo | Laubm. Oberfrank. 89 | 1868 |
| Ephemeraceae | |
Ephemerum serratum var. rutheanum
| (Schimp.) Jur. | Laubm.-Fl. Oesterr.-Ung. 5 | 1882 |
| Ephemeraceae | |
Ephemerum serratum subsp. serratum
| | | |
| Ephemeraceae | |
Ephemerum serratum var. serratum
| | | |
| Ephemeraceae | |
Ephemerum serratum var. subintegrum
| Douin | Mém. Soc. Sci. Nat. Math. Cherbourg 35: 285 | 1906 |
| Ephemeraceae | |
Ephemerum serratum var. subulatum
| Boulay | Musc. France, Mousses 577 | 1884 |
| Ephemeraceae | |
Ephemerum serratum var. tenerum
| (Bruch & Schimp.) Hampe | Flora 20: 285 | 1837 |