| Collector | Madsen, E. B. |
| Number | 84321 |
| Collected with | Madsen, J. E. |
| Country | Ecuador |
| Subpart | LOJA |
| County | |
| Locality | Catamayo Valley. Dry slopes and "quebradas" E of La Toma - Catamayo. Mixed scrub. |
| Coordinates | 3° 58' S 79° 20' W |
| Minimum elevation (m) | 2200 |
| Maximum elevation (m) | 2200 |
| Start date | 1988/10/07 |
| End date | 1988/10/07 |
| Family | Sterculiaceae |
| Identification | Byttneria loxensis Crist—bal |
| Determined by | Cristóbal, C.L. (CTES), 1995. |
| Identification qualifier | |
| Field notes | Scrambling liana. Stem green with white ridges, diameter ca. 2 cm. Lower part of stems spiny on the ridges. Flowers purplish brown, rotate. |