| Collector | Madsen, J. E. |
| Number | 50207 |
| Collected with | |
| Country | Ecuador |
| Subpart | EL ORO |
| County | |
| Locality | Road Huaquillas - Arenillas, km 2 from Huaquillas. Dry forest, dominated by arborescent cacti. |
| Coordinates | 3° 30' S 80° 13' W |
| Minimum elevation (m) | 0 |
| Maximum elevation (m) | 50 |
| Start date | 1984/02/16 |
| End date | 1984/02/16 |
| Family | Cactaceae |
| Identification | Armatocereus cartwrightianus (Britton & Rose)Backeb. |
| Determined by | |
| Identification qualifier | |
| Field notes | Tree, to 5 m high. Joints dark green. Ribs about 6. Strong spines, to 17 cm long, on trunk of old plants. Plants severely marked by fire. |
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