Ptychomitrium serratum
- kingdom: Plantae
- phylum: Bryophyta
- class: Bryopsida
- order: Grimmiales
- family: Ptychomitriaceae
- genus: Ptychomitrium
- species: Ptychomitrium serratum
Massapequa- Massapequa Park
- North Massapequa
- Seaford
New York
United States