| Collector | Irwin, H.S. |
| Number | 6452 |
| Collected with | T.R.Soderstrom |
| Country | Brazil |
| Subpart | Mato Grosso |
| County | |
| Locality | Plants of the Planalto do Brazil. Vicinity of Garapú. Swampy ground, margin of creek |
| Coordinates | 13° 12' S 52° 34' W |
| Minimum elevation (m) | 300 |
| Maximum elevation (m) | 400 |
| Start date | 1964/09/30 |
| End date | 1964/09/30 |
| Family | Annonaceae |
| Identification | Guatteria rigida R.E.Fr. |
| Determined by | P.J.M.Maas & L.Y.Th.Westra |
| Identification qualifier | |
| Field notes | Shrub about 2 m tall. Perianth grey-green, anthers pale yellow, fruit green. |
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