| Author | L. | |
| Distribution | This species is considered by Weakley (2018) to be present in the Coastal Plain and Piedmont in NC, but not in the Mountains. However, his map does show its presence in the Mountains of VA and in eastern TN, and the map below does show at least one Mountain record. Apparently its range is limited essentially to the northern half of the state, as it is absent in SC (as shown on the BONAP map). Website editors have mapped only those specimens that were annotated by experts.
This is a wide-ranging species from Canada south to central US, to NC, TX, and CA, with disjunct records in FL. | |
| Abundance | Weakley (2018) indicates that it is "uncommon" in both the Piedmont and in the Coastal Plain of NC. Based on the NC specimens, it is very rare in the northern Coastal Plain, rare in the northern (at least northeastern) Piedmont, and rare in the northern Mountains. The NCNHP considers this as a Watch List (W7) species. | |
| Habitat | In VA, the habitats are "Quiet water of ditches, streams, marshes, and ponds" (Digital Atlas of the Virginia Flora website). |
| Phenology | Seldom flowers, and then from June to September. | |
| Identification | Lemna species are tiny floating plants with flattened leaf-like stems (fronds) that produce roots under the stem (i.e., under the water surface). These species have just one root per frond. This species has 3-5 nerves on a frond. For further separation characters, see the key in Weakley (2018). | |
| Taxonomic Comments | None
The range maps for this and other duckweeds (Lemna spp.) are likely to be very incomplete, owing to recent changes in nomenclature; not to mention being in a group of plants often overlooked or not often collected by biologists because of their tiny size and aquatic/floating habits. | |
| Other Common Name(s) | None | |
| State Rank | S2S3 | |
| Global Rank | G5 | |
| State Status | W7 | |
| US Status | | |
| USACE-agcp | OBL link |
| USACE-emp | OBL link |
