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American Rockbrake - Cryptogramma acrostichoides
Other Names:
Cryptogramma crispa
Native Species
Global Rank:
G5
State Rank:
S4
C-value:
Agency Status
USFWS:
USFS:
BLM:
External Links
General Description
Rhizome short, covered with old leaf bases. Sterile leaves 4–25 cm long, petiole ca. half the length, blades 2 to 3 times pinnate, leathery, parsley-like, ultimate lobes elliptic. Pinnules with some secondary veins ending in sunken, white hydathodes. Fertile leaves up to 30 cm long, mostly twice pinnate, pinnules linear with yellowish margins rolled under and often meeting in the center before they split at maturity (
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 across much of the western third of the state, east to Carbon and Stillwater counties; Asia, AK to ON south to CA, NM, MN, and MI (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Observations in Montana Natural Heritage Program Database
Number of Observations: 167
(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
Shallow soil of rock outcrops, rock slides, less common on wet cliffs; at all elevations (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Stewardship Responsibility
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?
Hawkins, P.H. 1903. The alpine flora of Montana. M.Sc. Thesis, Bozeman, MT: Montana State University. 24 pp.- 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.
- Williams, K.L. 2012. Classification of the grasslands, shrublands, woodlands, forests and alpine vegetation associations of the Custer National Forest portion of the Beartooth Mountains in southcentral Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 376 p.
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