Isoetes × truncata

Taxonavigation

Taxonavigation: Isoetales
Superregnum: Eukaryota Cladus: Orthokaryota Cladus: Neokaryota Cladus: Photokaryota Cladus: Diaphoretickes Cladus: CAM Cladus: Archaeplastida Regnum: Plantae Divisio: Tracheophyta Divisio: Lycopodiophyta Classis: Lycopodiopsida Subclassis: Isoetidae Ordo: Isoetales

Familia: Isoetaceae
Genus: Isoetes
Species: Isoetes × truncata

Name

Isoetes × truncata (A.A.Eaton) Clute, Fern Allies 223 (1905).

• Formula hybridae: Isoetes maritima Underw. × Isoetes occidentalis L.F.Hend.
• Typus: United States, Alaska, Kadiak (Kodiak Island), 20 July 1899, Coville & Mearns 2337 (Holotypus: MO 2140189, isotypi: GH, US).

Synonyms

• Basionym
  • Isoetes echinospora var. truncata A.A.Eaton in Gilbert, Working List North American Pteridophytes 27 (1901).
• Homotypic
  • Isoetes muricata subsp. truncata (A.A.Eaton) H.P.Fuchs, Proc. Kon. Ned. Akad. Wetensch. C 85(2): 239 (1982).

Distribution

Native distribution areas:
Continental: Northern America Regional: Subarctic America Alaska. Regional: Western Canada Alberta. References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition

References

Primary references

• Britton, D.M. & Brunton, D.F. 1993. Isoetes ×truncata (A.A.Eaton) Clute: a newly considered pentaploid hybrid from western North America. Canadian Journal of Botany 71(8): 1016–1025. DOI: 10.1139/b93-117 Reference page. 

Links

• Govaerts, R. et al. 2026. Isoetes × truncata in Kew Science Plants of the World Online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2026 Jun 8. Reference page. 
• Tropicos.org 2026. Isoetes × truncata. Missouri Botanical Garden. Published online. Accessed: 8 Jun 2026. Reference page.
• International Plant Names Index. 2026. Isoetes × truncata. Published online. Accessed: 8 Jun 2026. Reference page.
• Hassler, M. 2026. World Ferns. Checklist of Ferns and Lycophytes of the World. . Isoetes × truncata Accessed: 8 Jun 2026. Reference page.