| Orthotrichaceae | |
Orthotrichum tenellum var. commune
| Venturi | Muscol. Gall. 186 | 1887 |
| Orthotrichaceae | |
Orthotrichum tenellum var. coulteri
| (Mitt.) Grout | N. Amer. Fl. 15A: 19 | 1946 |
| Orthotrichaceae | |
Orthotrichum tenellum var. cylindrocarpum
| (Lesq.) L.F. Koch | Leafl. W. Bot. 6: 23 | 1950 |
| Orthotrichaceae | |
Orthotrichum tenellum var. decipiens
| Venturi | Muscol. Gall. 186 | 1887 |
| Orthotrichaceae | |
Orthotrichum tenellum fo. gemmiferum
| Barkman | Acta Bot. Neerl. 3: 130 | 1954 |
| Orthotrichaceae | ** |
Orthotrichum tenellum var. mediterraneum
| Venturi ex E. Piccioli | Trav. Inst. Bot. Univ. Neuchâtel 1: 65 | 1932 |
| Orthotrichaceae | |
Orthotrichum tenellum var. meridionale
| Boulay | Musc. France, Mousses 335 | 1884 |
| Orthotrichaceae | |
Orthotrichum tenellum var. pumilum
| (Sw.) Boulay | Musc. France, Mousses 335 | 1884 |
| Orthotrichaceae | |
Orthotrichum tenellum fo. tenellum
| | | |
| Orthotrichaceae | |
Orthotrichum tenellum var. tenellum
| | | |
| Orthotrichaceae | * |
Orthotrichum tenellum var. vulgare
| Boulay | Musc. France, Mousses 335 | 1884 |