| Name | Elodea guyannensis f. longifolia Chodat & Hassler |
| Authorship | Chodat & Hassler |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Elodea guyannensis Richard |
| Citation | 1903 Bull. Herb. Boissier ser. 2, 3: 1033 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Elodea guyannensis f. longifolia Chodat & Hassler |
| Identification made in | [no date] (1) |
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