Smooth Cliffbrake - Pellaea glabella
(see State Rank Reason below)
MNPS Threat Rank
State Rank Reason (see State Rank above)
Pellaea glabella is scattered in central and western Montana. From 1886-2010 about 44 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
ScoreE - 26-125 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 2–40 cm long with petiole shorter than or equal to the blade. Leaf blade linear, 1–2 times pinnate below. Pinnae ascending, narrowly elliptic, deeply lobed, or pinnate into lanceolate pinnules. Sporangia with 32 or 64 spores (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
In MT mostly in the western half, with outliers in Phillips and Powder River counties; BC to QC south to AZ, TX and TN (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)
- Literature Cited AboveLegend: View Online Publication
- Flora of North America Editorial Committee, eds. 1993. Flora of North America North of Mexico. Volume 2. Pteridophytes and Gymnosperms. Oxford University Press, Inc., NY. xvi + 475 pp.
- Great Plains Flora Association (McGregor, R.L., coordinator, and T.M. Barkley, R.E. Brooks, and E.K. Schofield - eds.). 1986. Flora of the Great Plains. Lawrence, KS: Univ. Press Kansas. 1392 pp.
- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.