| Collector | Madsen, J. E. |
| Number | 63983 |
| Collected with | |
| Country | Ecuador |
| Subpart | GUAYAS |
| County | |
| Locality | Isla Puná. Path Río Hondo to Cerro Yanzun. Dry forest with Ceibo eriotheca, Cochlospermum and Geoffraea. (80° 3´W; 2° 46´S). |
| Coordinates | 2° 44' S 80° 3' W |
| Minimum elevation (m) | 0 |
| Maximum elevation (m) | 100 |
| Start date | 1987/10/02 |
| End date | 1987/10/03 |
| Family | Asteraceae |
| Identification | Parthenium hysterophorus L. |
| Determined by | Robinson, H. (US), 1993. |
| Identification qualifier | |
| Field notes | Herb, 80 cm high. Flowers white. A single plant at disturbed, wet dip. |
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