| Classification | Rosaceae: Crataegus |
| Barcode(s) | 00295974 |
| 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 | 2009-07-16 |
| 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 |
| Substrate | black organic loam |
| Frequency | second plant 2 m. to the south |
| Remarks | Associates: Acer platanoides (removed), Carya glabra, C. ovata, Celastrus orbiculatus (removed), Fragaria virginiana, Prunus serotina, Quercus alba, Q. coccinea, Rhus hirta, Rubus flagellaris |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/3fcd9b31-5258-4f23-9b72-3d811301be93 |
| Harvard University Herbaria Barcode | 00295974 |
| 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 |
