Monilophytes (ferns): Leptosporangiate Ferns (true ferns): Polypodiales
WEAKLEY'S FLORA (5/21/15):
Cystopteris fragilis
FAMILY
Cystopteridaceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Cystopteris fragilis
FAMILY
Dryopteridaceae
SYNONYMOUS WITH
Manual of the Southeastern Flora (Small, 1933)
Cystopteris fragilis var. fragilis
LESS THAN
Flora of West Virginia (Strausbaugh & Core, 1978)
Cystopteris fragilis
COMMON NAME:
Fragile Fern, Brittle Fern
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USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913 pnd_fifr_001_lvd
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Emily B. Sessa ebs_cfragilis3868
April
Pinnules variably lobed with toothed to smooth margins, per Peterson Field Guide to Ferns of Northeastern and Central North America.
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Emily B. Sessa ebs_cfragilis1797
July
Blades lanceolate with pointed tips, widest just below middle, ~ dissected, per Peterson Field Guide to Ferns of Northeastern and Central North America.
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Emily B. Sessa ebs_cfragilis1798
July
If toothed, pinnae margins have sharp teeth (veins ending at teeth tips), per Peterson Field Guide to Ferns of Northeastern and Central North America.
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Emily B. Sessa ebs_cfragilis1798b
July
Sori few and scattered, on veins, per Peterson Field Guide to Ferns of Northeastern and Central North America.