Isoetes nuttallii

Isoetes nuttallii, or Nuttall's quillwort, is a species of quillwort, a type of lycopod. It is native to shallow waters and other wet habitats of western North America from British Columbia to California. It produces up to 60 pointed, cylindrical, green to gray-green leaves, each 7 to 17 centimeters long. The velum completely covers the spherical sporangia, which are 5 millimeters long and 1.5 millimeters wide. The ligule is small and triangular. The megaspores are 400 to 500 micrometers in diameter. The microspores, which are spiny and covered in tubercles, are 28 to 31 micrometers long.[3]

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

Calamaria nuttallii (A.Braun) Kuntze
Calamaria suksdorfii (Baker) Kuntze
Isoetes opaca Nutt. ex Engelm.
Isoetes suksdorfii Baker

References
  1. Smith, K. (2016). "Isoetes nuttallii". IUCN Red List of Threatened Species. 2016: e.T64315210A67729791. doi:10.2305/IUCN.UK.2016-1.RLTS.T64315210A67729791.en. Retrieved September 23, 2020.
  2. "Isoetes nuttallii A.Braun". Plants of the World Online. The Trustees of the Royal Botanic Gardens, Kew. n.d. Retrieved September 23, 2020.
  3. Cody, William; Britton, Donald (1989). Ferns and Fern Allies of Canada. Agriculture Canada.


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