Heterophyllium haldanianum
- kingdom: Plantae
- phylum: Bryophyta
- class: Bryopsida
- order: Hypnales
- family: Sematophyllaceae
- genus: Heterophyllium
- species: Heterophyllium haldanianum
- Canada
- Oviedo
Florida- Cold Spring Harbor
- Laurel Hollow
New York- Mount Pocono
Pennsylvania
United States