Biology:Cystopteris protrusa
| Cystopteris protrusa | |
|---|---|
| |
| Cystopteris protrusa fronds | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Division: | Polypodiophyta |
| Class: | Polypodiopsida |
| Order: | Polypodiales |
| Suborder: | Aspleniineae |
| Family: | Cystopteridaceae |
| Genus: | Cystopteris |
| Species: | C. protrusa
|
| Binomial name | |
| Cystopteris protrusa (Weatherby) Blasdell
| |
Cystopteris protrusa is a common fern of North America, commonly known as the lowland bladderfern, lowland brittle fern or lowland fragile fern.[2]
The plant is native to eastern Canada, and the Midwestern and Eastern United States. Throughout much of its range it is the most common Cystopteris fern species.[3][4]
Description
Unlike most species of the genus Cystopteris, this fern is exclusively terrestrial, often forming large, dense colonies. It is also largely a spring ephemeral. Some fronds may remain by late summer, but most have disappeared.[5]
The specific name, protrusa, refers to the fact that the rhizome protrudes a short distance beyond the current year's fronds to form the following year's leaf buds. This protrusion is a positive diagnostic in the field. Sori are round and covered in a bladder-like indusium.[6]
Taxonomy
Cystopteris protrusa was originally considered only a variety of Cystopteris fragilis.[7] However, it is now known that this is a diploid species, while C. fragilis (ss) is a polyploid species of hybrid origin. C. protrusa is a parent of the hybrid species Cystopteris tennesseensis and Cystopteris tenuis.[8]
See also
- Cystopteris hybrid complex
References
- ↑ "NatureServe Explorer 2.0 - Cystopteris protrusa Lowland Bladderfern". https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.149561/Cystopteris_protrusa. Retrieved 9 October 2020.
- ↑ "Cystopteris protrusa - Plant Finder". http://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=v190.
- ↑ "Cystopteris protrusa page". http://www.missouriplants.com/Ferns/Cystopteris_protrusa_page.html.
- ↑ "Cystopteris protrusa in Flora of North America @ efloras.org". http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=200003877.
- ↑ "Cystopteris protrusa (Weatherby) Blasdell - Database of Vascular Plants of Canada (VASCAN)". http://data.canadensys.net/vascan/taxon/5379?lang=en.
- ↑ "Plants Profile for Cystopteris protrusa (lowland bladderfern)". https://plants.usda.gov/core/profile?symbol=CYPR4.
- ↑ "NameThatPlant.net: Cystopteris protrusa". http://www.namethatplant.net/plantdetail.shtml?plant=430.
- ↑ "Southern Fragile Fern (Cystopteris protrusa)". https://www.illinoiswildflowers.info/grasses/plants/fragile_fern.htm.
External links
Wikidata ☰ Q5201283 entry
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