Athyrium filix-femina var. angustum (Willd.) G. Lawson
  • Edinburgh New Philos. J.
  • Northern lady fern

Cite taxon page as 'WFO (2019): Athyrium filix-femina var. angustum (Willd.) G. Lawson. Published on the Internet; Accessed on: 23 Nov 2019'

General Information

Petiole (7--)15--55 cm; scales brown to dark brown, linear-lanceolate, 8(--10) × 2 mm. Blade elliptic, 2-pinnatifid to 2-pinnate, (20--)30--75 × (5--)10--35 cm, moderately narrowed proximally, broadest near or just below middle, apex acuminate. Pinnae short-stalked or sessile, oblong-lanceolate. Pinnules decurrent onto costal wing or sessile, linear to oblong, base unequally cuneate, apex obtuse to acute or in larger leaves acuminate, lobed halfway or more to costules. Rachis , costae, and costules glabrous or with pale glands. Sori straight, less frequently hooked at distal end or horseshoe-shaped; sporangial stalks bearing glandular hairs; indusia irregularly dentate, ± ciliate. Spores yellow or brown. 2 n = 80.

  • Provided by: [B].Flora of North America @
    • Source: [
    • 1
    • ]. 

    Other Local Names

    Northern lady fern

     Information From

    World Flora Online Data. 2017.
    • A CC0 1.0 Universal (CC0 1.0).
    Flora of North America @
    'Flora of North America @ eFloras (2008). Published on the Internet [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • B Flora of North America Association
    World Flora Online consortium
    World Flora Online Data. 2018.
    • C CC0 1.0 Universal (CC0 1.0).