| Name | Juncus tenuis var. williamsii Fernald |
| Authorship | Fernald |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Juncus tenuis Willdenow |
| GUID | urn:lsid:ipni.org:names:132339-2 |
| Citation | 1901 Rhodora 3: 60 |
| Holdings | 43 Specimens held in the Harvard University Herbaria identified as Juncus tenuis var. williamsii Fernald |
| Identification made in | [no date] (43) |
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