Isoetes tuckermanii
| Isoetes tuckermanii | |
|---|---|
| |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Lycophytes |
| Class: | Lycopodiopsida |
| Order: | Isoetales |
| Family: | Isoetaceae |
| Genus: | Isoetes |
| Species: | I. tuckermanii
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| Binomial name | |
| Isoetes tuckermanii | |
| Synonyms[2] | |
|
Calamaria tuckermanii (A.Braun ex Engelm.) Kuntze | |
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
[edit]- ^ 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.
- ^ a b c "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.
- ^ "Isoetes tuckermanii A. Braun ex Engelm". World Flora Online. The World Flora Online Consortium. n.d. Retrieved September 26, 2020.
- ^ NRCS. "Isoetes tuckermanii". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 26 May 2015.
- ^ a b Cody, William; Britton, Donald (1989). Ferns and Fern Allies of Canada. Agriculture Canada.
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