Engelmann's quillwort
- kingdom: Plantae
- phylum: Tracheophyta
- class: Lycopodiopsida
- order: Isoetales
- family: Isoetaceae
- genus: Isoetes
- species: Isoetes engelmannii
Weatogue- West Hartford
Connecticut- Hamilton Square
New Jersey- Borough of Bronx
New York- Banner Elk
- Jefferson
- Newland
- Rutherfordton
North Carolina
United States