| Classification | Rosaceae: Crataegus |
| Harvard University Herbaria Barcode(s) | 00295973 |
| Collector | B. T. Hamlin |
| Country | United States of America |
| State | Massachusetts |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Massachusetts: Middlesex County: Medford |
| Locality | Mystic River Watershed, Middlesex Fells Reservation, south side of Rock Circuit Trail west of Hemlock Pool Path |
| Date Collected | 2009-10-08 |
| Elevation | 46 m |
| Verbatim Elevation | 150 feet/46 m. |
| Habitat | at top edge on far side (out of sight from trail) of small Rock Bald, with Oak-Hickory Forest on adjacent slope, in part shade |
| Container | Plants of Massachusetts |
| Substrate | black organic loam |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/7dcf999a-c9b7-4e29-821e-53d4180f00cb |
| Harvard University Herbaria Barcode | 00295973 |
| Herbarium | NEBC |
| Family | Rosaceae |
| Determination | Crataegus keepii Sargent |
| Determined by | Haines, Arthur Duane |
| Date Determined | 2010-01-08 |
| Determination Remarks | [filed under] [label name] [current name] |
| Phenology | Fruit |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
