| Collector | Ollgaard, B. |
| Number | 9486 |
| Collected with | Balslev, H. |
| Country | Ecuador |
| Subpart | MORONA-SANTIAGO |
| County | |
| Locality | Muletrack Sevilla de Oro - Méndez, eastern slope (E of Cerro Negro, El Castillo). Montane forest along muletrack. |
| Coordinates | 2° 47' S 78° 34' W |
| Minimum elevation (m) | 2800 |
| Maximum elevation (m) | 2950 |
| Start date | 1976/09/15 |
| End date | 1976/09/15 |
| Family | Thelypteridaceae |
| Identification | Thelypteris arenosa A. R. Sm. |
| Determined by | A. R. Smith (UC), 1979. |
| Identification qualifier | |
| Field notes | Rhizome erect, trunk-like, to 30 cm high. |
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