Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Rosids: Malvids: Myrtales
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Ludwigia bonariensis is much like L. octovalvis, but with huge flowers (to ~ 2-3" across) and a rather short floral tube, whereas the native L. octovalvis has flowers ~ 1.5" across and a very long floral tube. Read more at Vascular Plants of North Carolina.
SYNONYMOUS WITH Flora of North America north of Mexico, vol. 10 (2021)
SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 137-01-002:
Ludwigia bonariensis FAMILY Onagraceae
SYNONYMOUS WITH Manual of the Southeastern Flora (Small, 1933, 1938)
South American Seedbox
NameThatPlant has no pictures at this time. You might try this link: Flora of the Southeastern United States
Flora of North America north of Mexico, vol. 10
Manual of the Southeastern Flora (Small, 1933, 1938)
Habitat: Freshwater tidal marshes and adjacent disturbed areas, per Weakley's Flora
Non-native: tropical America, apparently
Rare or waif(s)
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.
Click here to see a map showing all occurrences known to SERNEC, a consortium of southeastern herbaria. (Zoom in to see more detail.)
Leaves sessile or subsessile
TO LEARN MORE about this plant, look it up in a good book!
If a search such as "Carex leptalea var. leptalea" doesn't deliver the results you want, try "Carex leptalea".
Or, to minimize chances of a misspelling, try just "Carex le".
Less is more: If "pencil flower" doesn't deliver the results you want, try "pencil".