https://www.usgs.gov/publications/distribution-vallisneria-americana-seeds-and-seedling-light-requirements-upper
The distribution of Vallisneria americana seeds and seedling light requirements in the Upper...
Vallisneria americana declined in backwaters of the Upper Mississippi River, U.S.A., after a drought in 1988. To determine whether viable seeds of V. americana...
vallisneria americana
https://www.fws.gov/species/watercelery-vallisneria-americana
Watercelery (Vallisneria americana) | U.S. Fish & Wildlife Service
vallisneria americanaufishwildlifeservice