| Author | C.N. Horn | |
| Distribution | Heteranthera multiflora was split into several species in 2020 by C.N. Horn. H. missouriensis is centered in the Mississippi River valley, with some isolated records farther to the east (including east of the Appalachians) that are of uncertain provenance. In NC, collections from Davidson County in the central Piedmont have apparently been attributed to this species. Weakley's (2020) map indicates it to be of uncertain provenance in NC, as this is essentially a species west of the Appalachians.
Ranges from IL and NE south to MS, with isolated records from AL and NC, both of which are considered perhaps not natural occurrences. | |
| Abundance | Seemingly very rare; only just a single collection (apparently). | |
| Habitat | Similar to other Heteranthera species -- mud, shallow still waters, etc. | |
| Phenology | Flowers and fruits from June - October. | |
| Identification | This species has lavender to purple flowers; the other two species in the genus in NC (H. reniformis and H. pauciflora) have whitish to blue flowers. The inflorescence also contains 5-16 flowers, as opposed to 2-8 flowers in the other two species. | |
| Taxonomic Comments | This species was named by Horn in 2020, who split H. multiflora into several species, with that species limited now just to South America, this one to the southern US west of the Appalachians, and H. pauciflora being an Atlantic Coastal Plain species.
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| Other Common Name(s) | Missouri Mud-plantain | |
| State Rank | SE? | |
| Global Rank | GNR | |
| State Status | | |
| US Status | | |
| USACE-agcp | | |
| USACE-emp | | |
