Cystopteris fragilis (L.) Bernh. - Fragile Fern


 

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Cystopteris fragilis - (image 1 of 2)

 

Taxonomy

Family: Woodsiaceae

Habitat

Cliffs, rocky slopes, talus.

Associates

 

Distribution

Circumboreal, south in North America to MI, VT, and in mountains to NC.

Morphology

Leaves deciduous, stems brittle; basal pinnules broad-based and mostly sessile or subsessile; indusium to 1 mm, usually cleft at the apex.      

Notes

Spores produced late May to early August.

Wetland indicator: FACU

Similar to C. tenuis which has basal pinnules that taper to the base and has a more southern distribution.

References

Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Ed.
The New York Botanical Garden. Bronx, NY

 


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 Michael Hough 2018