Isoetes tuckermanii
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Lycophytes
Class: Lycopodiopsida
Order: Isoetales
Family: Isoetaceae
Genus: Isoetes
Species:
I. tuckermanii
Binomial name
Isoetes tuckermanii
Synonyms[2]

Calamaria tuckermanii (A.Braun ex Engelm.) Kuntze
Isoetes tuckermanii var. borealis A.A.Eaton

Isoetes tuckermanii, or Tuckerman's quillwort,[4] is a tetraploid species of plant in the family Isoetaceae.[2] It can be found in shallow water in Newfoundland, Nova Scotia, New Brunswick, and south through the New England states to Maryland.[5] It bears 10 to 45 long bright green to yellow green leaves that are 4 to 25 centimeters long, usually erect, but sometimes recurved. The velum covers one fourth or less of the sporangium, which is usually unspotted, 5 millimeters long, and 3 millimeters wide. The white spherical megaspores are 400 to 650 micrometers in diameter, and bear rough-crested ridges that form a hexagonal honeycomb shape. The kidney shaped microspores are 24 to 33 micrometers long, bearing tubercles.[5] It is very similar to I. macrospora, only reliably distinguishable by cytology or through careful megaspore measurement.

References

  1. ↑ Maiz-Tome, L. (2016). "Isoetes tuckermanii". IUCN Red List of Threatened Species. 2016: e.T64315234A67729801. doi:10.2305/IUCN.UK.2016-1.RLTS.T64315234A67729801.en. Retrieved 19 November 2021.
  2. 1 2 3 "Isoetes tuckermanii A.Braun ex Engelm". Plants of the World Online. The Trustees of the Royal Botanic Gardens, Kew. n.d. Retrieved September 26, 2020.
  3. ↑ "Isoetes tuckermanii A. Braun ex Engelm". World Flora Online. The World Flora Online Consortium. n.d. Retrieved September 26, 2020.
  4. ↑ USDA, NRCS (n.d.). "Isoetes tuckermanii". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 26 May 2015.
  5. 1 2 Cody, William; Britton, Donald (1989). Ferns and Fern Allies of Canada. Agriculture Canada.


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