| Collector | Holm-Nielsen, L. B. |
| Number | 29449 |
| Collected with | Jaramillo, J. & Coello, F. |
| Country | Ecuador |
| Subpart | MORONA-SANTIAGO |
| County | |
| Locality | Páramo de Matanga, km 38 on road Sigsig - Gualaquiza (old muletrack) E of the pass. Deep ravine with scrub. |
| Coordinates | 3° 12' S 78° 47' W |
| Minimum elevation (m) | 3150 |
| Maximum elevation (m) | 3150 |
| Start date | 1980/12/14 |
| End date | 1980/12/14 |
| Family | Thelypteridaceae |
| Identification | Thelypteris retrorsa (Sodiro)A. R. Sm. |
| Determined by | A. R. Smith |
| Identification qualifier | |
| Field notes | Rhizome vertical. |
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