| Classification | Rosaceae: Crataegus |
| Barcode(s) | 00017883 |
| Type Status | Syntype |
| Collector | A. Twining |
| Collector number | 25 |
| Country | United States of America |
| State | Pennsylvania |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Pennsylvania: Lackawanna County: Dunmore |
| Date Collected | 1907-05-28 |
| Remarks | Another syntype is also on this sheet (Twining 25 [fruiting specimen], see record number 17884) |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/d5dce063-7b68-4565-8531-4db0097f0129 |
| Harvard University Herbaria Barcode | 00017883 |
| Herbarium | A |
| Family | Rosaceae |
| Type Status | Syntype |
| Syntype of | Crataegus impervia Sargent |
| Verified by | D. E. Boufford |
| Determination Remarks | [filed under] |
| Taxon Reference | (for Crataegus impervia Sargent) Proc. Acad. Nat. Sci. Philadelphia 1910. 62: 197. |
| Subcollection | Fruit collection |
| Sex | not determined |
| Phenology | Flower |
| Preparation Type | Bag |
| Preparation Method | Dried |
