Biology:Isoetes riparia
| Isoetes riparia | |
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Lycophytes |
| Class: | Lycopodiopsida |
| Order: | Isoetales |
| Family: | Isoetaceae |
| Genus: | Isoetes |
| Species: | I. riparia
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| Binomial name | |
| Isoetes riparia | |
| Synonyms | |
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Isoetes riparia, the shore quillwort,[4] is a species of plant in the family Isoetaceae.[2] It can be found in rivers, creeks, and tidal mud flats in southern Quebec and southeastern Ontario, south to eastern New York.[5] It has 5 to 35 long, erect bright green to yellow-green leaves, which are 6 to 35 centimeters long. The velum covers one fourth of the sporangium, which can be 7 millimeters long and 4 millimeters wide. The elongated ligule can grow to be 3 millimeters long. The spherical megaspores are 430 to 680 micrometers in diameter with closely set ridges. The kidney-shaped microspores are 24-35 micrometers long, and usually have spine-tipped tubercules. The megaspores can sometimes come to resemble that of either I. echinospora, if the megaspores become eroded and bear projections that could resemble spines, or I. macrospora, if the broken ridges take a certain shape.[5]
References
- ↑ Smith, K. (2016). "Isoetes riparia". IUCN Red List of Threatened Species 2016: e.T64315225A67729796. doi:10.2305/IUCN.UK.2016-1.RLTS.T64315225A67729796.en. https://www.iucnredlist.org/species/64315225/67729796. Retrieved 19 November 2021.
- ↑ 2.0 2.1 "Isoetes riparia Engelm. ex A.Braun". The Trustees of the Royal Botanic Gardens, Kew. n.d.. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:30058274-2.
- ↑ "Isoetes riparia Engelm. ex A. Braun". The World Flora Online Consortium. n.d.. http://www.worldfloraonline.org/taxon/wfo-0001108966.
- ↑ "Isoetes ripara". Natural Resources Conservation Service PLANTS Database. USDA. https://plants.usda.gov/core/profile?symbol=ISRI. Retrieved 26 May 2015.
- ↑ 5.0 5.1 Cody, William; Britton, Donald (1989). Ferns and Fern Allies of Canada. Agriculture Canada. https://archive.org/details/fernsfernallieso0000cody.
Wikidata ☰ Q17023009 entry
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