Alpine Ladyfern - Athyrium alpestre
Athyrium americanum, Athyrium distentifolium
MNPS Threat Rank
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)
Circumboreal south to CA and CO (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Observations in Montana Natural Heritage Program Database
Number of Observations:
(Click on the following maps and charts to see full sized version)
Map Help and Descriptions
(Observations spanning multiple months or years are excluded from time charts)
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)
- Additional ReferencesLegend: View Online Publication
Do you know of a citation we're missing?
- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.