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

Aspidotis densa (Brack.) Lellinger
dense lace fern
Pteridaceae (Maidenhair Fern family)

Introduction to Vascular Plants

© Virginia Skilton  Email the photographer   (Photo ID #20092)

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Distribution of Aspidotis densa
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Species Information

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Evergreen perennial in dense clumps from a short rhizome.
Broadly diamond-shaped, 5-25 cm long, 3- to 4-pinnate into narrow linear segments, 3-10 mm long, segments of sterile leaves broader than those of fertile leaves.
East of the Coast-Cascade Mountains this species is restricted to serpentine rock outcrops.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry to moist or seepy rock outcrops in the lowland, steppe and montane zones; infrequent in BC south of 54degreeN; disjunct E to PQ and S to WY, UT, NV and CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Aspidotis densa

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) 232 1108 1550
Slope Gradient (%) 5 39 75
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
77 183 260
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 1 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: CWH(1), ESSF(2), ICH(1), MS(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.

Synonyms and Alternate Names

Cheilanthes densa
Cheilanthes siliquosa Maxon
Cryptogramma densa (Brack.) Diels
Onychium densum Brack.
Pellaea densa (Brack.) Hook.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References