Tropicos | Name - Athyrium filix-femina subsp. angustum (Willd.) R.T. Clausen

Missouri > Athyrium > Athyrium filix-femina > Athyrium filix-femina subsp. angustum

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Athyrium filix-femina subsp. angustum (Willd.) R.T. Clausen

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Published In: Cornell University Agricultural Experiment Station Memoir 291: 7. 1949. (Cornell Univ. Agric. Exp. Sta. Mem.)

Project Name Data (Last Modified On 7/9/2009)

Acceptance : Accepted

Project Data (Last Modified On 7/9/2009)

Status: Native

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1a. ssp. angustum (Willd.) R.T. Clausen (northern lady fern) Pl. 4e

A. angustum (Willd.) C. Presl

A. filix-femina var. angustum (Willd.) T. Moore

A. filix-femina var. michauxii (Spreng.) Farw.

A. filix-femina f. elatius (Link) Clute

A. filix-femina f. rubellum (Gilbert) Farw.

Petiole scales brown to dark brown. Leaf blades elliptic, broadest near the middle and tapering to the base, the rachises and midribs usually glandular. Spores yellow to light brown. 2n=80. June–October.

Nearly throughout the species’ range in Missouri, but more common north of the Missouri River (northeastern U.S. west to South Dakota, south to North Carolina; Canada).

This subspecies is somewhat less common in Missouri than ssp. asplenioides. The leaf blades tend to be slightly less divided than in the other subspecies, but the degree of leaf division is variable.