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Montana Field Guide

Montana Field Guides

Maidenhair Fern - Adiantum aleuticum
Other Names:  Adiantum pedatum ssp. aleuticum

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Native Species

Global Rank: G5
State Rank: S3S4
C-value: 7


Agency Status
USFWS:
USFS:
BLM:


 

External Links

 
General Description
Plants with a short, stout, horizontal or ascending rhizome. Leaves monomorphic, arching to erect, 10–60 cm long with a glabrous, shiny, black petiole; the blades fan-shaped, appearing palmately divided into several pinnately divided pinnae. Pinnae with 15 to 35 light green, fan-shaped to oblong pinnules, 10–25 mm long with jagged apical margins. Sori crescent-shaped, borne on edges of pinnules, covered by inrolled margins (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Montana Range Range Descriptions

Native
 


Range Comments
In MT only in the northwestern counties south to Ravalli and Deer Lodge counties; AK to NL south to CA, AZ, CO, PA, and disjunct in Mexico (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 16

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Wet rock crevices or shallow soil of cliffs, occasional in damp forest, usually in partial shade; montane, subalpine (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
  • Literature Cited AboveLegend:   View Online Publication
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
  • Web Search Engines for Articles on "Maidenhair Fern"
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Citation for data on this website:
Maidenhair Fern — Adiantum aleuticum.  Montana Field Guide.  .  Retrieved on , from