| Classification | Juncaceae: Juncus | 
| Harvard University Herbaria Barcode(s) | 00105958 | 
| Type Status | Isosyntype | 
| Collector | A. Kellogg | 
| Collector number | 11 | 
| Country | United States of America | 
| State | California | 
| Geography | North America: North America (CA, US, MX) (Region): United States of America: California | 
| Locality | Large bogs in wet sandy soil on Lobos Creek, near San Francisco | 
| Date Collected | 1866-08-04 | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/564c973a-0f74-4c64-acfa-dd7368dea2a6 | 
| Harvard University Herbaria Barcode | 00105958 | 
| Herbarium | GH | 
| Family | Juncaceae | 
| Type Status | Isosyntype | 
| Isosyntype of | Juncus effusus var. brunneus Engelmann | 
| Verified by | P. F. Zika | 
| Determination Remarks | [filed under] | 
| Taxon Reference | (for  Juncus effusus var. brunneus Engelmann) Trans. Acad. Sci. St. Louis 1868. 2: 491. | 
| Sex | not determined | 
| Phenology | Fruit | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed |