Isoetes nuttallii
| 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 | |
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]
References
- ^ 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 20 November 2021.
- ^ "Isoetes nuttallii A.Braun". Plants of the World Online. The Trustees of the Royal Botanic Gardens, Kew. n.d. Retrieved September 23, 2020.
- ^ Cody, William; Britton, Donald (1989). Ferns and Fern Allies of Canada. Agriculture Canada. ISBN 9780660131023.
External links
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