| Collector | Holm-Nielsen, L. B. |
| Number | 21442 |
| Collected with | Jaramillo, J. & Brandbyge, J. |
| Country | Ecuador |
| Subpart | NAPO |
| County | |
| Locality | Río Cuyabeno. 10 km upstream from Río Aguarico. Rich temporarely inundated Mauritia forest. |
| Coordinates | 0° 14' S 75° 56' W |
| Minimum elevation (m) | 220 |
| Maximum elevation (m) | 220 |
| Start date | 1980/02/19 |
| End date | 1980/02/19 |
| Family | Euphorbiaceae |
| Identification | Acalypha macrostachya Jacq. |
| Determined by | Cardiel, J.M. (MA), 1999. |
| Identification qualifier | |
| Field notes | Shrub 3 m. Inflorescences green. |