Ludwigia microcarpa
A small perennial primrose-willow of wet pine savannas, ditches and pond margins on the southeastern US coastal plain, with tiny petal-less greenish flowers and minute fruits. It wants sun, constantly wet feet and warm summers, and is grown mainly as a bog or emergent pond-edge plant.
Where it grows wild
Open, seasonally flooded wetlands: wet pine savannas and flatwoods, cypress pond edges, marshy roadsides and ditches, in wet sandy or peaty soil.
Lowland coastal plain; recorded at 1–338 m, median 25 m.
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The wild conditions above, turned into targets for a shelf, a tent or a greenhouse. The full profile has:
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Profiles are drafts built from measured range and climate and from published sources; each section carries its own confidence in the app. Photo from Wikimedia Commons, used under its CC BY-SA 4.0 licence, unmodified.