slender waternymph
- kingdom: Plantae
- phylum: Tracheophyta
- class: Liliopsida
- order: Alismatales
- family: Hydrocharitaceae
- genus: Najas
- species: Najas gracillima
Kalochórion
Central Macedonia
Greece
Danbury- Milford
- Newtown
- West Hartford
Connecticut- Natick
- Winchester
- Woburn
Massachusetts- Albany
- Rensselaer
New York- Union
South Carolina
United States