| Classification | Rosaceae: Crataegus |
| Harvard University Herbaria Barcode(s) | 00016870 |
| Type Status | Probable Type, Neotype |
| Collector | K. K. Mackenzie |
| Collector number | 615 |
| Country | United States of America |
| State | Missouri |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Missouri: Jackson County: Westport |
| Date Collected | 1901-10-08 |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/c1a4f9bd-a704-4da3-8101-f63640b60696 |
| Harvard University Herbaria Barcode | 00016870 |
| Herbarium | A |
| Family | Rosaceae |
| Type Status | Probable Type |
| Probable Type of | Crataegus mackenzii Sargent |
| Verified by | D. E. Boufford |
| Date Determined | 1986 |
| Taxon Reference | (for Crataegus mackenzii Sargent) Man. Fl. Jackson County 1902. 108. |
| Family | Rosaceae |
| Type Status | Neotype |
| Neotype of | Crataegus mackenzii Sargent |
| Verified by | J. B. Phipps (UWO) & G. Yatskievych (MO) |
| Date Determined | 2003 |
| Taxon Reference | (for Crataegus mackenzii Sargent) Man. Fl. Jackson County 1902. 108. |
| Family | Rosaceae |
| Determination | Crataegus pruinosa var. rugosa (Ashe) Kruschke |
| Determined by | J. B. Phipps (UWO) & G. Yatskievych (MO) |
| Date Determined | 2003 |
| Determination Remarks | [current name] |
| Sex | not determined |
| Phenology | Fruit |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
