E-Flora BC: Electronic Atlas of the Flora of British Columbia

Cryptogramma stelleri (S.G. Gmel.) Prantl
slender rock-brake (fragile rockbrake)
Pteridaceae (Maidenhair Fern family)

Introduction to Vascular Plants

© Curtis Bjork  Email the photographer   (Photo ID #24702)

E-Flora BC Static Map
Distribution of Cryptogramma stelleri
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Species Information

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Deciduous perennial from a long creeping rhizome.
Thin, 3-15 cm long, from deeply pinnately lobed to 2-pinnate, segments of sterile leaves oblong, egg-shaped to fan-shaped; fertile leaves only slightly differentiated from the sterile ones, their segments narrower than in sterile leaves.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Wet crevices in calcareous rocks from the steppe and montane to alpine zones; infrequent throughout BC; circumpolar, N to AK, YT and NT, E to AB and S to CO, UT, NV and OR, disjunct to ON and NF and S to ME, NH, PA, WV, IL and IA; N Eurasia.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Cryptogramma stelleri

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres) 1670 1716 1770
Slope Gradient (%) 50 67 80
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
180 204 260
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
2 2 3
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: BAFA(1)


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Taxonomic and Nomenclatural Links

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General References