| Collector | Grayum, M. |
| Number | 10639 |
| Collected with | B.Hammel, R.Aguilar, J.Gómez |
| Country | Costa Rica |
| Subpart | Puntarenas |
| County | |
| Locality | Canton de Osa. Fila Costeña, Fila Cruces; limestone ridges and adjacent valleys, ca. 1.5 km N of upper Río Piedras Blancas. |
| Coordinates | 8° 49' 24'' N 83° 11' 48'' W |
| Minimum elevation (m) | 800 |
| Maximum elevation (m) | 950 |
| Start date | 1993/12/09 |
| End date | 1993/12/09 |
| Family | Aspleniaceae |
| Identification | Asplenium radicans var. uniseriale (Raddi)Gomez |
| Determined by | |
| Identification qualifier | |
| Field notes | Terrestrial and epilithic in primary forest on limestone ridge. Stipe and rachis blackish, glossy. Fronds radicant at apex. |
|