| Classification | Cyperaceae: Scirpus | 
| Barcode(s) | 00028643 | 
| Type Status | Isotype | 
| Collector | E. F. Williams & M. L. Fernald | 
| Collector number | 26 | 
| Country | United States of America | 
| State | Massachusetts | 
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Massachusetts: Norfolk County: Sharon | 
| Locality | Sandy shore of Massapoag Lake | 
| Date Collected | 1901-09-07 | 
| Remarks | = Schoenoplectus purshianus (Pursh) M. T. Strong f. williamsii (Fern.) ined., det. S. Galen Smith, 1995 | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/9e4ed1e9-b9e5-47ff-ae1a-d68e413e0077 | 
| Harvard University Herbaria Barcode | 00028643 | 
| Herbarium | NEBC | 
| Family | Cyperaceae | 
| Type Status |  Isotype | 
| Isotype of |  Scirpus debilis var. williamsii Fernald | 
| Determination Remarks |  [filed under] | 
| Taxon Reference | (for  Scirpus debilis var. williamsii Fernald) Rhodora 1901. 3: 252. | 
| Sex | not determined | 
| Phenology | NotDetermined | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed |