Vallisneria americana
American eelgrass or tape grass, a fully submerged aquatic with long ribbon leaves that spreads by runners in lakes and slow rivers. It is easy in ponds and aquariums given clean water, a rooted substrate and moderate to bright light; northern forms die back to winter buds in cold water.
Where it grows wild
Rooted in sand or silt on the bottoms of lakes, rivers and estuaries, usually in 0.5–4 m of clear to slightly turbid fresh or slightly brackish water.
Recorded at 0–1,016 m (median 85 m, 44 records); mostly lowland waters.
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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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More Vallisneria
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.