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Montana Field Guide

Montana Field Guides

American Rockbrake - Cryptogramma acrostichoides
Other Names:  Cryptogramma crispa


Global Rank: G5
State Rank: S4

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

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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 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


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 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 53

(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 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
American Rockbrake — Cryptogramma acrostichoides.  Montana Field Guide.  .  Retrieved on , from