| Collector | Holm-Nielsen, L. B. |
| Number | 23709 |
| Collected with | Balslev, H. |
| Country | Ecuador |
| Subpart | PICHINCHA |
| County | |
| Locality | Road Olmedo - Laguna San Marcos. Boggy areas in the valley dominated of Juncus arcticus. |
| Coordinates | 0° 7' N 78° 0' W |
| Minimum elevation (m) | 3500 |
| Maximum elevation (m) | 3500 |
| Start date | 1980/05/21 |
| End date | 1980/05/21 |
| Family | Juncaceae |
| Identification | Juncus arcticus var. andicola (Hook.)Balslev |
| Determined by | H. Balslev, 1985 |
| Identification qualifier | |
| Field notes | In tall grass vegetation below timberline and in humid ditches along road. Rhizome ca. 10 cm below soil surface. |