| Classification | Polygalaceae: Polygala | 
| Harvard University Herbaria Barcode(s) | 00025999 | 
| Type Status | Type | 
| Collector | H. S. Irwin, R. Reis dos Santos, R. Souza & J. W. Grear, Jr. | 
| Collector number | 16487 | 
| Country | Brazil | 
| State | Mato Grosso | 
| Geography | South America: South America (Region) (Region): Brazil: Mato Grosso | 
| Locality | Serro do Roncador: Cerrado, ca. 87 km north of Xavantina, alt. 550 m | 
| Date Collected | 1966-06-02 | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/04a60857-e1da-4aad-a3d6-3ecb85d433ac | 
| Harvard University Herbaria Barcode | 00025999 | 
| Herbarium | GH | 
| Family | Polygalaceae | 
| Type Status | Type | 
| Type of | Polygala irwinii Wurdack | 
| Determination Remarks | [filed under] | 
| Taxon Reference | (for  Polygala irwinii Wurdack) Phytologia 1974. 28: 12. | 
| Sex | not determined | 
| Phenology | Flower | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed |