| Classification | Rhodophyta: Ceramiaceae: Callithamnion |
| Harvard University Herbaria Barcode(s) | 00776249 |
| Collector | C. H. Clarke |
| Country | United States of America |
| State | Massachusetts |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Massachusetts: Barnstable County: Falmouth: Woods Hole |
| Locality | [no additional data] |
| Project | Macroalgae TCN |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/7873f10b-7506-4654-af31-9be916fe023b |
| Harvard University Herbaria Barcode | 00776249 |
| Herbarium | FH |
| Family | Ceramiaceae |
| Determination | Callithamnion tetragonum (Withering) Gray |
| Determination Remarks | [is filed under name] [is Current name] |
| Sex | not determined |
| Phenology | NotDetermined |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
