Helanthium tenellum
The pygmy chain sword, a small aquatic plant with narrow leaves 1-4 cm long that spreads by runners into a lawn, found in shallow wetlands from the eastern United States to Argentina. It is one of the most adaptable carpeting plants for aquariums and also grows emersed in a damp paludarium.
Where it grows wild
Shallow water and muddy shores of ponds, marshes and river margins, often submerged in the wet season and growing emersed as water levels drop.
Mostly lowland: recorded from sea level to 1,700 m, median 200 m.
🔒 Growing it like that
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 4.0 licence, unmodified.