| Classification | Cyperaceae: Scirpus |
| Classification 1 | Cyperaceae: Schoenoplectiella |
| Classification 2 | Cyperaceae: Schoenoplectus |
| Harvard University Herbaria Barcode(s) | 00027993 |
| Type Status | Holotype |
| Collector | E. F. Williams & M. L. Fernald |
| 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 border of Massapoag Lake |
| Date Collected | 1901-09-07 |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/ed244da2-61ed-4568-9082-628d9eb3bd45 |
| Harvard University Herbaria Barcode | 00027993 |
| Herbarium | GH |
| Family | Cyperaceae |
| Type Status | Holotype |
| Holotype of | Scirpus debilis var. williamsii Fernald |
| Determination Remarks | [filed under] [label name] |
| Taxon Reference | (for Scirpus debilis var. williamsii Fernald) Rhodora 1901. 3: 252. |
| Family | Cyperaceae |
| Type Status | Holotype |
| Holotype of | Scirpus debilis var. williamsii Fernald |
| Verified by | Smith, S. Galen |
| Date Determined | 1995 |
| Taxon Reference | (for Scirpus debilis var. williamsii Fernald) Rhodora 1901. 3: 252. |
| Family | Cyperaceae |
| Determination | Schoenoplectiella purshiana var. williamsii (Fernald) Hayasaka |
| Determination Remarks | [current name] |
| Determination | |
| Determined by | Shiels, Derek |
| Date Determined | 2013-03-19 |
| Family | Cyperaceae |
| Determination | Schoenoplectus purshianus var. williamsii (Fernald) S. G. Smith |
| Determined by | Smith, S. Galen |
| Date Determined | 1995 |
| Sex | not determined |
| Phenology | NotDetermined |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
