Issler's clubmoss
- kingdom: Plantae
- phylum: Tracheophyta
- class: Lycopodiopsida
- order: Lycopodiales
- family: Lycopodiaceae
- genus: Diphasiastrum
- species: Diphasiastrum complanatum
- Prince George
British Columbia- Fort Smith
- Yellowknife
Northwest Territories- Baie-Saint-Paul
- Cabano
- Chibougamau
- Contrecoeur
- Drummondville
- Ferme-Neuve
- Fermont
- Hudson
- La Pocatière
- Lachute
- Longueuil
- Pohénégamook
- Pont-Rouge
- Rigaud
- Rimouski
- Rivière-du-Loup
- Saguenay
- Saint-Augustin
- Saint-Augustin-de-Desmaures
- Saint-Jérôme
- Salaberry-de-Valleyfield
- Sept-Îles
- Sherbrooke
- Thetford-Mines
- Trois-Rivières
- Ville-Marie
Quebec
Canada- Kangding
Sichuan
China- Luxembourg
- Urshel’skiy
Vladimir
Russian Federation- Miquelon
Miquelon-Langlade
Saint Pierre And Miquelon- Visby
Gotland- Fjärås kyrkby
- Knäred
Halland- Lönsboda
Skåne- Bergeforsen
- Bollstabruk
- Fränsta
- Köpmanholmen
- Njurundabommen
- Stockvik
- Timrå
Västernorrland
Sweden- LaPorte
Indiana- Paxton
Massachusetts- East Brunswick
- South River
New Jersey- Snoqualmie
Washington
United States