| Classification | Rosaceae: Crataegus |
| Harvard University Herbaria Barcode(s) | 00017359 |
| Type Status | Holotype |
| Collector | B. F. Bush |
| Collector number | 346 |
| Country | United States of America |
| State | Missouri |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Missouri: Ripley County: Pleasant Grove |
| Date Collected | 1900-05-20 |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/9ed513b5-0fc0-4211-b901-c7bcf37f31d5 |
| Harvard University Herbaria Barcode | 00017359 |
| Herbarium | A |
| Family | Rosaceae |
| Determination | Crataegus calpodendron (Ehrhart) Medikus |
| Determined by | J. B. Phipps (UWO) & G. Yatskievych (MO) |
| Date Determined | 2003 |
| Determination Remarks | [is Current name] |
| Family | Rosaceae |
| Type Status | Holotype |
| Holotype of | Crataegus scabera Sargent |
| Verified by | D. E. Boufford |
| Date Determined | 1984 |
| Taxon Reference | (for Crataegus scabera Sargent) Trees & Shrubs [Sargent] 1913. 2: 245. |
| Family | Rosaceae |
| Type Status | Holotype |
| Holotype of | Crataegus scabera Sargent |
| Verified by | J. B. Phipps (UWO) & G. Yatskievych (MO) |
| Date Determined | 2003 |
| Taxon Reference | (for Crataegus scabera Sargent) Trees & Shrubs [Sargent] 1913. 2: 245. |
| Sex | not determined |
| Phenology | Flower |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
