Brewer's Cliffbrake - Pellaea breweri
(see State Rank Reason below)
MNPS Threat Rank
State Rank Reason (see State Rank above)
Pellaea breweri occurs widely scattered in central and western Montana. From 1949 and 1973-2014 about 30 locations have been found. Populations appear to be secure and grow in protected areas, such as the crevices of limestone in montane to subalpine habitats.
- Details on Status Ranking and Review
ScoreF - 20,000-200,000 sq km (~8,000-80,000 sq mi)
Area of Occupancy
ScoreD - 6-25 4-km2 grid cells
Number of Populations
ScoreC - 21 - 80
Number of Occurrences or Percent Area with Good Viability / Ecological Integrity
ScoreC - Few (4-12) occurrences with excellent or good viability or ecological integrity
ScoreB - Narrow. Specialist or community with key requirements common
ScoreD - Low
CommentNo known threats.
Leaves 4–15 cm long with petiole shorter than the blade. Leaf blade linear, once pinnate. Pinnae ascending, some 2-lobed or mitten-shaped. Sporangia with 64 spores (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
In MT scattered locations mostly in the southwest, although as far east as Big Horn County and north (disjunct) in Teton County; WA to MT south to CA, UT (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Observations in Montana Natural Heritage Program Database
Number of Observations:
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Map Help and Descriptions
(Observations spanning multiple months or years are excluded from time charts)
Crevices of limestone cliffs; montane to treeline.This species is strongly associated with Paleozoic rock formations (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
- Additional ReferencesLegend: View Online Publication
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- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.