| Name | Carex flava f. umbrosa Kneucker |
| Authorship | Kneucker |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Carex flava Linnaeus |
| Citation | 1899 Allg. Bot. Z. Syst. 5: 8 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Carex flava f. umbrosa Kneucker |
| Identification made in | [no date] (1) |
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