| Orthotrichum affine Schrad. ex Brid. |
Accepted |
6 |
| Orthotrichum alpestre Hornsch. ex B. S. G. |
Accepted |
11 |
| Orthotrichum anomalum Hedw. |
Accepted |
10 |
| Orthotrichum bolanderi Sull. |
Accepted |
6 |
| Orthotrichum calvum Hook. & Wilson |
Accepted |
6 |
| Orthotrichum consobrinum Cardot |
Accepted |
11 |
| Orthotrichum cupulatum Hoffm. ex Brid. |
Accepted |
11 |
| Orthotrichum diaphanum Schrad. ex Brid. |
Accepted |
10 |
| Orthotrichum graphiomitrium M. Hal. ex Beckett |
Accepted |
6 |
| Orthotrichum griffithii Mitt. ex Dixon |
Accepted |
10 |
| Orthotrichum hawaiicum M. Hal. |
Accepted |
6 |
| Orthotrichum hookeri Wilson ex Mitt. |
Accepted |
6 |
| Orthotrichum hortense Bosw. |
Accepted |
6 |
| Orthotrichum jamesianum Sull. |
Accepted |
18 |
| Orthotrichum laevigatum J. E. Zetterst. |
Accepted |
6 |
| Orthotrichum lyellii Hook. & Taylor |
Accepted |
6 |
| Orthotrichum obtusifolium Brid. |
Accepted |
10 |
| Orthotrichum ohioense Sull. & Lesq. |
Accepted |
11 |
| Orthotrichum pallens Bruch ex Brid. |
Accepted |
10 |
| Orthotrichum patens Bruch & Brid. |
Accepted |
21 |
| Orthotrichum philibertii Venturi |
Accepted |
10 |
| Orthotrichum pulchellum Brunt. |
Accepted |
10 |
| Orthotrichum pumilum Sw. |
Accepted |
11 |
| Orthotrichum pusillum Mitt. |
Accepted |
11 |
| Orthotrichum rivulare Turner |
Accepted |
10 |
| Orthotrichum rupestre Schleich. ex Schwägr. |
Accepted |
6 |
| Orthotrichum rupestre Schleich. ex Schwägr. |
Accepted |
6 |
| Orthotrichum sordidum Sull. & Lesq. |
Accepted |
6 |
| Orthotrichum speciosum Nees |
Accepted |
6 |
| Orthotrichum stellatum Brid. |
Accepted |
10 |
| Orthotrichum stramineum Hornsch. |
Accepted |
13 |
| Orthotrichum striatum Hedw. |
Accepted |
6 |
| Orthotrichum tasmanicum Hook. & Wilson |
Accepted |
6 |
| Orthotrichum tenellum Bruch ex Brid. |
Accepted |
11 |
| Orthotrichum tenellum var. coulteri (Mitt.) Grout |
Accepted |
10 |
| Orthotrichum urnigerum Myrin |
Accepted |
10 |
| Orthotrichum fastigiatum Bruch ex Brid. |
Synonym of Orthotrichum affine Schrad. ex Brid. |
6 |
| Orthotrichum octoblephare Brid. |
Synonym of Orthotrichum affine Schrad. ex Brid. |
6 |
| Orthotrichum duthiei Venturi |
Synonym of Orthotrichum alpestre Hornsch. ex B. S. G. |
11 |
| Orthotrichum venustum Venturi |
Synonym of Orthotrichum alpestre Hornsch. ex B. S. G. |
11 |
| Orthotrichum anomalum var. saxatile Milde |
Synonym of Orthotrichum anomalum Hedw. |
10 |
| Orthotrichum consobrinum None |
Synonym of Orthotrichum consobrinum Cardot |
11 |
| Orthotrichum virens Venturi |
Synonym of Orthotrichum crenulatum Mitt. |
11 |
| Orthotrichum cupulatum var. nudum None |
Synonym of Orthotrichum cupulatum var. nudum (Dicks.) Lindb. |
11 |
| Orthotrichum jamesianum None |
Synonym of Orthotrichum jamesianum Sull. |
18 |
| Orthotrichum laevigatum None |
Synonym of Orthotrichum laevigatum J. E. Zetterst. |
6 |
| Orthotrichum roellii Venturi |
Synonym of Orthotrichum laevigatum f. macounii (Austin) E. Lawton & Vitt |
6 |
| Orthotrichum ohioense None |
Synonym of Orthotrichum ohioense Sull. & Lesq. |
11 |
| Orthotrichum fallax Bruch ex Brid. |
Synonym of Orthotrichum pumilum Sw. |
11 |
| Orthotrichum schimperi Hammar |
Synonym of Orthotrichum pumilum Sw. |
11 |
| Orthotrichum rupestre None |
Synonym of Orthotrichum rupestre Schleich. ex Schwägr. |
6 |
| Orthotrichum texanum Sull. & Lesq. |
Synonym of Orthotrichum rupestre Schleich. ex Schwägr. |
6 |
| Orthotrichum texanum Sull. & Lesq. |
Synonym of Orthotrichum rupestre Schleich. ex Schwägr. |
6 |
| Orthotrichum sordidum None |
Synonym of Orthotrichum sordidum Sull. & Lesq. |
6 |
| Orthotrichum cylindrocarpum Lesq. |
Synonym of Orthotrichum tenellum Bruch ex Brid. |
11 |
