| Harvard University Herbaria Barcode(s) | 00017039 |
| Type Status | Syntype, Lectotype |
| Collector | E. J. Palmer |
| Collector number | 9b |
| Country | United States of America |
| State | Missouri |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Missouri: Jasper County: Webb City |
| Date Collected | 1902-05-18 |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/47eccd79-e7dc-4b35-a6e1-ed2f69fcda7c |
| Harvard University Herbaria Barcode | 00017039 |
| Herbarium | A |
| Type Status | Syntype |
| Syntype of | Crataegus obscura Sargent |
| Verified by | D. E. Boufford |
| Taxon Reference | (for Crataegus obscura Sargent) Rep. (Annual) Missouri Bot. Gard. 1908. 19: 119. |
| Type Status | Lectotype |
| Lectotype of | Crataegus obscura Sargent |
| Verified by | J. B. Phipps (UWO) & G. Yatskievych (MO) |
| Date Determined | 2003 |
| Taxon Reference | (for Crataegus obscura Sargent) Rep. (Annual) Missouri Bot. Gard. 1908. 19: 119. |
| Determination | Crataegus calpodendron (Ehrhart) Medikus |
| Determined by | J. B. Phipps (UWO) & G. Yatskievych (MO) |
| Date Determined | 2003 |
| Determination Remarks | [current name] |
| Sex | not determined |
| Phenology | Flower |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
