| Classification | Euphorbiaceae: Croton | 
| Harvard University Herbaria Barcode(s) | 00257956 | 
| Type Status | Possible Isotype | 
| Collector | R. Spruce | 
| Collector number | 2 | 
| Country | Brazil | 
| Geography | South America: South America (Region) (Region): Brazil | 
| Locality | Rio Negro, in vicinibus Barra | 
| Date Collected | 1850-12-** - 1851-03-** | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/5be0ae3e-f19d-4810-8def-c6b55da6b7db | 
| Harvard University Herbaria Barcode | 00257956 | 
| Herbarium | GH | 
| Family | Euphorbiaceae | 
| Type Status | Possible Isotype | 
| Possible Isotype of | Croton matourensis var. benthamianus Müller Argoviensis | 
| Verified by | B. van Ee (A) | 
| Date Determined | 2009-04-** | 
| Determination Remarks | "R. Spruce 21 [or 2, or 121?], Brazil, Rio Negro. In protologue: In Brasiliae septentrionalis prov. Rio Negro prope Barra (R. Spruce Crot. n. 2!)" noted on annotation label | 
| Taxon Reference | (for  Croton matourensis var. benthamianus Müller Argoviensis) Linnaea 1865 [ante Mar 1865]. 34(1): 95. | 
| Family | Euphorbiaceae | 
| Determination | Croton matourensis Aublet | 
| Determined by | P. E. Berry (WIS) | 
| Date Determined | 2005-04-** | 
| Determination Remarks | [current name] | 
| Sex | not determined | 
| Phenology | NotDetermined | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed |