| Name | Scirpus atrovirens var. pycnocephalus Fernald |
| Authorship | Fernald |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Scirpus atrovirens Muhlenberg |
| GUID | urn:lsid:ipni.org:names:230227-2 |
| Citation | 1906 Rhodora 8: 163 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Scirpus atrovirens var. pycnocephalus Fernald |
| Identification made in | [no date] (1) |
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