| Name | Dryopteris opposita var. longissima C. Christensen |
| Authorship | C. Christensen |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Dryopteris opposita (Vahl) Urban |
| GUID | urn:lsid:ipni.org:names:85097-2 |
| Citation | 1907 Kongel. Danske Vidensk. Selsk. Skr., Naturvidensk. Math. Afd. ser. 7, 4: 289 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Dryopteris opposita var. longissima C. Christensen |
| Identification made in | [no date] (1) |
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