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Cystopteris laurentiana
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Division:	Polypodiophyta
Class:	Polypodiopsida
Order:	Polypodiales
Suborder:	Aspleniineae
Family:	Cystopteridaceae
Genus:	Cystopteris
Species:	C. laurentiana
Binomial name
Cystopteris laurentiana (Weath.) Blasdell
Synonyms
Cystopteris fragilis var. laurentiana Weath. Cystopteris × tennesseensis subsp. laurentiana (Weath.) Windham

Cystopteris laurentiana, commonly called Laurentian bladderfern or St. Lawrence bladderfern, is a species of fern in the family Cystopteridaceae. It is native to eastern North America, primarily in the Great Lakes-St. Lawrence lowlands, but there are also scattered occurrences in New England and Atlantic Canada. It grows on cliffs composed of calcareous rocks, such as limestone, dolostone and diabase.

Taxonomy

Cystopteris laurentiana is a fertile allohexaploid hybrid between C. bulbifera (bulblet fern) and C. fragilis (fragile fern). The scientific name is therefore sometimes written as C. × laurentiana, which denotes hybrid origin.

References

1. "Cystopteris laurentiana (Weath.) Blasdell". Plants of the World Online.
2. ^ "Cystopteris laurentiana - FNA". beta.floranorthamerica.org. Retrieved 2023-02-18.
3. "Plants and Animals: Cystopteris laurentiana". Michigan Natural Features Inventory. 18 February 2023. Retrieved 18 February 2023.
4. "Cystopteris laurentiana (Laurentian Fragile Fern): Minnesota Wildflowers". www.minnesotawildflowers.info. Retrieved 2023-02-18.

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