Diphasiastrum tristachyum

Taxonavigation

Taxonavigation: Lycopodiales
Superregnum: Eukaryota Cladus: Diaphoretickes Cladus: CAM Cladus: Archaeplastida Regnum: Plantae Divisio: Tracheophyta Divisio: Lycopodiophyta Classis: Lycopodiopsida Subclassis: Lycopodiidae Ordo: Lycopodiales

Familia: Lycopodiaceae
Subfamilia: Lycopodioideae
Genus: Diphasiastrum
Species: Diphasiastrum tristachyum

Name

Diphasiastrum tristachyum (Pursh) Holub, Preslia 47(2): 108 (1975).

Synonyms

Basionym
- Lycopodium tristachyum Pursh, Fl. Amer. Sept. 653 (1814).
Homotypic
- Lycopodium clavatum var. tristachyum (Pursh) Hook., Fl. Bor.-Amer., Bot. N. Brit. Amer. 2: 267 (1840).
- Lycopodium aristatum var. tristachyum (Pursh) Hook. in unknown publication.
- Lycopodium complanatum var. tristachyum (Pursh) Clute, Fern Allies: 92 (1905).
- Diphasium tristachyum (Pursh) Rothm., Feddes Repert. Spec. Nov. Regni Veg. 54: 65 (1944).
- Lycopodium complanatum subsp. tristachyum (Pursh) Dostál, Kvetena CSR: 6 (1948).
Heterotypic
- Lycopodium chamaecyparissus A.Braun ex Mutel, Fl. Franc. 4: 192 (1837).
  - Lycopodium complanatum var. chamaecyparissus (A.Braun ex Mutel) Döll, Fl. Baden 1(1): 80 (1855).
  - Lycopodium complanatum subsp. chamaecyparissus (A.Braun ex Mutel) Milde, Nov. Actorum Acad. Caes Leop. Carol. Nat. Cur. 26: 395 (1858).
  - Lycopodium complanatum var. chamaecyparissus (A.Braun ex Mutel) A.A.Eaton, Manual (Gray), ed. 6. 697 (1890).
  - Lycopodium complanatum var. chamaecyparissus (A.Braun ex Mutel) Rosenv., Meddel. Gronland 3: 737. 1891. comb. superfl.
  - Lycopodium complanatum proles chamaecyparissus (A.Braun ex Mutel) Rouy in G.Rouy & J.Foucaud, Fl. France 14: 491 (1913).
  - Diphasium chamaecyparissus (A.Braun ex Mutel) Á.Löve & D.Löve, Bot. Not. 114: 34 (1961).
  - Diphasiastrum complanatum subsp. chamaecyparissus (A.Braun ex Mutel) Kukkonen, Ann. Bot. Fenn. 21(2): 210 (1984):
  - Diphasium complanatum subsp. chamaecyparissus (A.Braun ex Mutel) Dostál, nom. inval.
- Lycopodium complanatum var. patentifolium Spring, Nouv. Mém. Acad. Roy. Sci. Bruxelles 15: 102 (1842).

Hybrids

Diphasiastrum × habereri (House) Holub
Diphasiastrum × oellgaardii Stoor et al.
Diphasiastrum × sabinifolium (Willd.) Holub
Diphasiastrum × zeilleri (Rouy) Holub

Distribution

Native distribution areas:

Continental: Europe
- Regional: Northern Europe
  - Denmark, Finland, Great Britain (extinct), Iceland, Norway, Sweden.
- Regional: Middle Europe
  - Austria, Belgium (Belgique, Luxembourg), Czechia-Slovakia (Czech Republic), Germany (Brandenburg, Berlin (extinct), Baden-Württemberg, Bayern, Hessen, Hamburg (extinct), Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Rheinland-Pfalz, Schleswig-Holstein (extinct), Saarland, Sachsen, Sachsen-Anhalt, Thüringen), Hungary, Netherlands, Poland, Switzerland.
- Regional: Southwestern Europe
  - France.
- Regional: Southeastern Europe
  - Italy, Romania, Northwest Balkan Peninsula (Slovenia)
- Regional: Eastern Europe
  - Baltic States (Estonia, Latvia, Lithuania), Krym, Central European Russia, North European Russia, Northwest European Russia, Ukraine.
Continental: Asia-Temperate
- Regional: Caucasus
  - Transcaucasus (Adzhariya)
- Regional: Western Asia
  - TÜrkiye
Continental: Northern America
- Regional: Western Canada
  - Manitoba.
- Regional: Eastern Canada
  - Labrador, New Brunswick, Newfoundland, Nova Scotia, Ontario, Prince Edward Isle, Québec.
- Regional: North-Central U.S.A.
  - Minnesota, Missouri, Wisconsin.
- Regional: Northeastern U.S.A.
  - Connecticut, Indiana, Maine, Massachusetts, Michigan, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia,
- Regional: Southeastern U.S.A.
  - Alabama, Delaware, District of Columbia, Georgia, Kentucky, North Carolina, South Carolina, Tennessee, Virginia.

References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2^nd Edition

References

Primary references

Holub, J. 1975. Diphasiastrum, a new genus in Lycopodiaceae. Preslia 47(2): 97–110. PDF Reference page.

Links

Govaerts, R. et al. 2025. Diphasiastrum tristachyum in Kew Science Plants of the World Online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2025 Sep 10. Reference page.
Tropicos.org 2025. Diphasiastrum tristachyum. Missouri Botanical Garden. Published online. Accessed: 10 Sep 2025. Reference page.
International Plant Names Index. 2025. Diphasiastrum tristachyum. Published online. Accessed: 10 Sep 2025. Reference page.
Hassler, M. 2025. World Ferns. Checklist of Ferns and Lycophytes of the World. . Diphasiastrum tristachyum Accessed: 10 Sep 2025. Reference page.
Euro+Med 2006 onwards: Diphasiastrum tristachyum in Euro+Med PlantBase – the information resource for Euro-Mediterranean plant diversity. Published online. Accessed: 2019 May 20.Reference page.

Vernacular names

Deutsch: Zypressen-Flachbärlapp
English: Blue Clubmoss
eesti: Nõmm-vareskold
suomi: Harjukeltalieko
lietuvių: Trivarpė padraika
latviešu: Trejvārpu plakanstaipeknis
Nederlands: Kleine wolfsklauw
polski: Widlicz cyprysowy
slovenščina: troklasi dvorednik