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Isoetes ×dodgei

Scientific Name: Isoetes ×dodgei

Family: Isoetaceae

Category: Quillwort

Growth: Graminoid

Duration: Perennial

Other Names:

       

Dodge's Quillwort (Isoetes × dodgei)

Dodge's Quillwort, scientifically known as Isoetes × dodgei, is a hybrid quillwort that has garnered botanical interest for over seventy years across various locations.

Taxonomy and Nomenclature

  • Scientific Name: Isoetes × dodgei A.A. Eaton (pro sp.)
  • Common Name: Dodge's Quillwort
  • Family: Isoetaceae
  • Kingdom: Plantae
  • Phylum: Lycophyta
  • Class: Isoetopsida
  • Order: Isoetales
  • Taxonomic Status: Accepted
  • Synonyms: The text mentions it as a hybrid between Isoetes riparia and potentially Isoetes tenella. It has also been formerly confused with Isoetes lacustris L.

Distribution and Habitat

The text suggests a wide distribution of Isoetes species, including Isoetes × dodgei, with mentions of its presence in Tompkins County, NY, and references to studies conducted in New England in the late 1800s.

Ecological Role

  • Isoetes × dodgei is a known hybrid that can form with several other quillworts. Specifically, it's a rare hybrid derived from Isoetes riparia.

Morphological Characteristics and Growth Habits

The text provides limited information on the specific morphological characteristics of Isoetes × dodgei. However, it does classify it within the quillworts (Isoetes), which are generally considered "fern allies".

Genetic and Cytological Information

  • The text identifies Isoetes × dodgei as a triploid hybrid. Another related hybrid, Isoetes novae-angliae, is mentioned as a sterile hybrid between the tetraploid aquatic pteridophytes I. riparia and I. tuckermanii.

Interactions with Other Organisms

  • Isoetes × dodgei is a hybrid, implying interactions between different Isoetes species for its formation.

Resources and Further Information

  • USDA-NRCS PLANTS Database
  • ITIS (Integrated Taxonomic Information System) - TSN 181774
  • The Plant List
  • IPNI (International Plant Names Index)
  • Australian Plant Name Index
  • NYBG (New York Botanical Garden) Virtual Herbarium
  • Encyclopedia of Life
  • Wikimedia Commons (for images)
  • DiversityOfLife.org
  • PlantSystematics.org
  • PhytoImages.siu.edu
  • Gymnosperms.org