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Montana Field Guide

Montana Field Guides

Alpine Ladyfern - Athyrium alpestre
Other Names:  Athyrium americanum, Athyrium distentifolium


Global Rank: G4G5
State Rank: S4

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 7

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General Description
Leaves ascending or erect, densely clustered or widely separated in talus, 15–70 cm long, petiole shorter than the blade. Leaf blade narrowly lance-shaped, twice pinnate. Sori borne at sinuses of pinnule lobes. Indusium absent (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
Circumboreal south to CA and CO (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 1

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Relative Density

Recency

 

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



Habitat
Rock slides and stony soil of meadows, often along streams, less common in cliff crevices; subalpine to alpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Alpine Ladyfern — Athyrium alpestre.  Montana Field Guide.  .  Retrieved on , from