| Name | Eriophorum cyperinum var. laxum (A. Gray) Britton, Stearn & Poggenburg |
| Authorship | (A. Gray) Britton, Stearn & Poggenburg |
| Rank | Variety |
| Placed in | Eriophorum cyperinum Linnaeus |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Eriophorum cyperinum var. laxum (A. Gray) Britton, Stearn & Poggenburg |
| Identification made in | [no date] (2) |
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