Asplenium vespertinum Maxon
  • Bull. Torrey Bot. Club
  • Western spleenwort

Cite taxon page as 'WFO (2020): Asplenium vespertinum Maxon. Published on the Internet; Accessed on: 04 Jun 2020'

General Information

Roots not proliferous. Stems short-creeping, rarely branched; scales black with lighter margins, linear-lanceolate, 2--3 × 0.2--0.4 mm, margins entire, or denticulate distally. Leaves monomorphic. Petiole reddish brown or purplish black throughout, lustrous, 2--5 cm, 1/4--1/6 length of blade, sometimes curved like a J at base; indument of blackish brown, filiform scales at base. Blade linear, 1-pinnate throughout, 5--15(--28) × 1--2.5 cm, thick, glabrous; base gradually tapered; apex acute, not rooting. Rachis reddish brown or purplish black throughout, shiny, glabrous. Pinnae 15--30 pairs, oblong; medial pinnae 5--10 × 2--3 mm; base rounded to cuneate; margins lobed or serrate; apex obtuse. Veins free, obscure. Sori 2--6 pairs per pinna, on both basiscopic and acroscopic sides. Spores 64 per sporangium.

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

    Other Local Names

    Western spleenwort

     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).