| Collector | Irwin, H.S. |
| Number | 16316 |
| Collected with | J.W. Grear, R. Souza & R.R. Santos |
| Country | Brazil |
| Subpart | Estado de Mato Grosso |
| County | |
| Locality | Serra do Roncador. Gallery margin, ca. 86 km N of Xavantina, Mato Grosso |
| Coordinates | |
| Minimum elevation (m) | 550 |
| Maximum elevation (m) | 550 |
| Start date | 1966/05/31 |
| End date | 1966/05/31 |
| Family | Sterculiaceae |
| Identification | Byttneria petiolata Cristóbal |
| Determined by | |
| Identification qualifier | |
| Field notes | Shrub ca. 2.5 m. tall. flowers yellow, the corolla purplish at base. Fruit yellow-green. Frequent. |
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